enable lint prefer_single_quotes (#12665)

2017-10-22 18:11:36 +02:00 · 2017-10-22 18:11:36 +02:00 · 1fce14a31c
commit 1fce14a31c
parent b07ea41954
90 changed files with 664 additions and 663 deletions
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@ -125,7 +125,7 @@ linter:
    # - prefer_interpolation_to_compose_strings # not yet tested
    - prefer_is_empty
    - prefer_is_not_empty
-    # - prefer_single_quote_strings # not yet tested
+    - prefer_single_quotes
    # - public_member_api_docs # this is the only difference from analysis_options_repo.yaml
    - recursive_getters
    - slash_for_doc_comments
--- a/analysis_options_repo.yaml
+++ b/analysis_options_repo.yaml
@ -119,7 +119,7 @@ linter:
    # - prefer_interpolation_to_compose_strings # not yet tested
    - prefer_is_empty
    - prefer_is_not_empty
-    # - prefer_single_quote_strings # not yet tested
+    - prefer_single_quotes
    - public_member_api_docs # this is the only difference from analysis_options_repo.yaml
    - recursive_getters
    - slash_for_doc_comments
--- a/dev/automated_tests/flutter_test/filtering_test.dart
+++ b/dev/automated_tests/flutter_test/filtering_test.dart
@ -9,6 +9,6 @@ void main() {
    expect(2 + 2, 4);
  });
  test('excluded', () {
-    throw "this test should have been filtered out";
+    throw 'this test should have been filtered out';
  });
 }
--- a/dev/benchmarks/complex_layout/test_driver/semantics_perf_test.dart
+++ b/dev/benchmarks/complex_layout/test_driver/semantics_perf_test.dart
@ -31,7 +31,7 @@ void main() {
        expect(await driver.setSemantics(true), isTrue);
      });

-      final Iterable<TimelineEvent> semanticsEvents = timeline.events.where((TimelineEvent event) => event.name == "Semantics");
+      final Iterable<TimelineEvent> semanticsEvents = timeline.events.where((TimelineEvent event) => event.name == 'Semantics');
      if (semanticsEvents.length != 1)
        fail('Expected exactly one semantics event, got ${semanticsEvents.length}');
      final Duration semanticsTreeCreation = semanticsEvents.first.duration;
--- a/dev/manual_tests/lib/card_collection.dart
+++ b/dev/manual_tests/lib/card_collection.dart
@ -29,7 +29,7 @@ class CardCollectionState extends State<CardCollection> {
    const TextStyle(color: Colors.white, fontSize: 18.0, fontWeight: FontWeight.bold);

  // TODO(hansmuller): need a local image asset
-  static const String _sunshineURL = "http://www.walltor.com/images/wallpaper/good-morning-sunshine-58540.jpg";
+  static const String _sunshineURL = 'http://www.walltor.com/images/wallpaper/good-morning-sunshine-58540.jpg';

  static const double kCardMargins = 8.0;
  static const double kFixedCardHeight = 100.0;
@ -103,23 +103,23 @@ class CardCollectionState extends State<CardCollection> {
        child: new ListView(
          children: <Widget>[
            const DrawerHeader(child: const Center(child: const Text('Options'))),
-            buildDrawerCheckbox("Make card labels editable", _editable, _toggleEditable),
-            buildDrawerCheckbox("Fixed size cards", _fixedSizeCards, _toggleFixedSizeCards),
-            buildDrawerCheckbox("Let the sun shine", _sunshine, _toggleSunshine),
-            buildDrawerCheckbox("Vary font sizes", _varyFontSizes, _toggleVaryFontSizes, enabled: !_editable),
+            buildDrawerCheckbox('Make card labels editable', _editable, _toggleEditable),
+            buildDrawerCheckbox('Fixed size cards', _fixedSizeCards, _toggleFixedSizeCards),
+            buildDrawerCheckbox('Let the sun shine', _sunshine, _toggleSunshine),
+            buildDrawerCheckbox('Vary font sizes', _varyFontSizes, _toggleVaryFontSizes, enabled: !_editable),
            const Divider(),
-            buildDrawerColorRadioItem("Deep Purple", Colors.deepPurple, _primaryColor, _selectColor),
-            buildDrawerColorRadioItem("Green", Colors.green, _primaryColor, _selectColor),
-            buildDrawerColorRadioItem("Amber", Colors.amber, _primaryColor, _selectColor),
-            buildDrawerColorRadioItem("Teal", Colors.teal, _primaryColor, _selectColor),
+            buildDrawerColorRadioItem('Deep Purple', Colors.deepPurple, _primaryColor, _selectColor),
+            buildDrawerColorRadioItem('Green', Colors.green, _primaryColor, _selectColor),
+            buildDrawerColorRadioItem('Amber', Colors.amber, _primaryColor, _selectColor),
+            buildDrawerColorRadioItem('Teal', Colors.teal, _primaryColor, _selectColor),
            const Divider(),
-            buildDrawerDirectionRadioItem("Dismiss horizontally", DismissDirection.horizontal, _dismissDirection, _changeDismissDirection, icon: Icons.code),
-            buildDrawerDirectionRadioItem("Dismiss left", DismissDirection.endToStart, _dismissDirection, _changeDismissDirection, icon: Icons.arrow_back),
-            buildDrawerDirectionRadioItem("Dismiss right", DismissDirection.startToEnd, _dismissDirection, _changeDismissDirection, icon: Icons.arrow_forward),
+            buildDrawerDirectionRadioItem('Dismiss horizontally', DismissDirection.horizontal, _dismissDirection, _changeDismissDirection, icon: Icons.code),
+            buildDrawerDirectionRadioItem('Dismiss left', DismissDirection.endToStart, _dismissDirection, _changeDismissDirection, icon: Icons.arrow_back),
+            buildDrawerDirectionRadioItem('Dismiss right', DismissDirection.startToEnd, _dismissDirection, _changeDismissDirection, icon: Icons.arrow_forward),
            const Divider(),
-            buildFontRadioItem("Left-align text", TextAlign.left, _textAlign, _changeTextAlign, icon: Icons.format_align_left, enabled: !_editable),
-            buildFontRadioItem("Center-align text", TextAlign.center, _textAlign, _changeTextAlign, icon: Icons.format_align_center, enabled: !_editable),
-            buildFontRadioItem("Right-align text", TextAlign.right, _textAlign, _changeTextAlign, icon: Icons.format_align_right, enabled: !_editable),
+            buildFontRadioItem('Left-align text', TextAlign.left, _textAlign, _changeTextAlign, icon: Icons.format_align_left, enabled: !_editable),
+            buildFontRadioItem('Center-align text', TextAlign.center, _textAlign, _changeTextAlign, icon: Icons.format_align_center, enabled: !_editable),
+            buildFontRadioItem('Right-align text', TextAlign.right, _textAlign, _changeTextAlign, icon: Icons.format_align_right, enabled: !_editable),
            const Divider(),
            new ListTile(
              leading: const Icon(Icons.dvr),
@ -282,16 +282,16 @@ class CardCollectionState extends State<CardCollection> {
    String backgroundMessage;
    switch (_dismissDirection) {
      case DismissDirection.horizontal:
-        backgroundMessage = "Swipe in either direction";
+        backgroundMessage = 'Swipe in either direction';
        break;
      case DismissDirection.endToStart:
-        backgroundMessage = "Swipe left to dismiss";
+        backgroundMessage = 'Swipe left to dismiss';
        break;
      case DismissDirection.startToEnd:
-        backgroundMessage = "Swipe right to dismiss";
+        backgroundMessage = 'Swipe right to dismiss';
        break;
      default:
-        backgroundMessage = "Unsupported dismissDirection";
+        backgroundMessage = 'Unsupported dismissDirection';
    }

    // TODO(abarth): This icon is wrong in RTL.
--- a/dev/manual_tests/lib/material_arc.dart
+++ b/dev/manual_tests/lib/material_arc.dart
@ -211,7 +211,7 @@ class _PointDemoState extends State<_PointDemo> {
            child: new Padding(
              padding: const EdgeInsets.all(16.0),
              child: new Text(
-                "Tap the refresh button to run the animation. Drag the green "
+                'Tap the refresh button to run the animation. Drag the green '
                "and red points to change the animation's path.",
                style: Theme.of(context).textTheme.caption.copyWith(fontSize: 16.0)
              )
@ -384,7 +384,7 @@ class _RectangleDemoState extends State<_RectangleDemo> {
            child: new Padding(
              padding: const EdgeInsets.all(16.0),
              child: new Text(
-                "Tap the refresh button to run the animation. Drag the rectangles "
+                'Tap the refresh button to run the animation. Drag the rectangles '
                "to change the animation's path.",
                style: Theme.of(context).textTheme.caption.copyWith(fontSize: 16.0)
              )
--- a/dev/manual_tests/lib/page_view.dart
+++ b/dev/manual_tests/lib/page_view.dart
@ -112,7 +112,7 @@ class PageViewAppState extends State<PageViewApp> {
    return new AppBar(
      title: const Text('PageView'),
      actions: <Widget>[
-        new Text(scrollDirection == Axis.horizontal ? "horizontal" : "vertical"),
+        new Text(scrollDirection == Axis.horizontal ? 'horizontal' : 'vertical'),
      ],
    );
  }
--- a/dev/manual_tests/test/card_collection_test.dart
+++ b/dev/manual_tests/test/card_collection_test.dart
@ -8,7 +8,7 @@ import 'package:flutter_test/flutter_test.dart';
 import '../lib/card_collection.dart' as card_collection;

 void main() {
-  testWidgets("Card Collection smoke test", (WidgetTester tester) async {
+  testWidgets('Card Collection smoke test', (WidgetTester tester) async {
    card_collection.main(); // builds the app and schedules a frame but doesn't trigger one
    await tester.pump(); // see https://github.com/flutter/flutter/issues/1865
    await tester.pump(); // triggers a frame
--- a/dev/manual_tests/test/color_testing_demo_test.dart
+++ b/dev/manual_tests/test/color_testing_demo_test.dart
@ -8,7 +8,7 @@ import 'package:flutter_test/flutter_test.dart';
 import '../lib/color_testing_demo.dart' as color_testing_demo;

 void main() {
-  testWidgets("Color testing demo smoke test", (WidgetTester tester) async {
+  testWidgets('Color testing demo smoke test', (WidgetTester tester) async {
    color_testing_demo.main(); // builds the app and schedules a frame but doesn't trigger one
    await tester.pump(); // see https://github.com/flutter/flutter/issues/1865
    await tester.pump(); // triggers a frame
--- a/dev/tools/gen_localizations.dart
+++ b/dev/tools/gen_localizations.dart
@ -42,34 +42,35 @@ const String outputHeader = '''
 final Map<String, Map<String, String>> localeToResources = <String, Map<String, String>>{};

 /// Maps locales to resource attributes.
-/// 
+///
 /// See also https://github.com/googlei18n/app-resource-bundle/wiki/ApplicationResourceBundleSpecification#resource-attributes
 final Map<String, Map<String, dynamic>> localeToResourceAttributes = <String, Map<String, dynamic>>{};

-// Return s as a Dart-parseable raw string in double quotes. Expand double quotes:
-// foo => r"foo"
-// foo "bar" => r"foo " '"' r"bar" '"'
+// Return s as a Dart-parseable raw string in single or double quotes. Expand double quotes:
+// foo => r'foo'
+// foo "bar" => r'foo "bar"'
+// foo 'bar' => r'foo ' "'" r'bar' "'"
 String generateString(String s) {
-  if (!s.contains('"'))
-    return 'r"$s"';
+  if (!s.contains("'"))
+    return "r'$s'";

  final StringBuffer output = new StringBuffer();
  bool started = false; // Have we started writing a raw string.
  for (int i = 0; i < s.length; i++) {
-    if (s[i] == '"') {
+    if (s[i] == "'") {
      if (started)
-        output.write('"');
-      output.write(' \'"\' ');
+        output.write("'");
+      output.write(' "\'" ');
      started = false;
    } else if (!started) {
-      output.write('r"${s[i]}');
+      output.write("r'${s[i]}");
      started = true;
    } else {
      output.write(s[i]);
    }
  }
  if (started)
-    output.write('"');
+    output.write("'");
  return output.toString();
 }

@ -84,12 +85,12 @@ String generateLocalizationsMap() {
 const Map<String, Map<String, String>> localizations = const <String, Map<String, String>> {''');

  for (String locale in localeToResources.keys.toList()..sort()) {
-    output.writeln('  "$locale": const <String, String>{');
+    output.writeln("  '$locale': const <String, String>{");

    final Map<String, String> resources = localeToResources[locale];
    for (String name in resources.keys) {
      final String value = generateString(resources[name]);
-      output.writeln('    "$name": $value,');
+      output.writeln("    '$name': $value,");
    }
    output.writeln('  },');
  }
--- a/dev/tools/mega_gallery.dart
+++ b/dev/tools/mega_gallery.dart
@ -91,7 +91,7 @@ void _createEntry(File mainFile, int copies) {

  for (int i = 1; i < copies; i++) {
    imports.writeln("import 'gallery_$i/main.dart' as main_$i;");
-    importRefs.writeln("  main_$i.main;");
+    importRefs.writeln('  main_$i.main;');
  }

  final String contents = '''
--- a/examples/catalog/bin/sample_page.dart
+++ b/examples/catalog/bin/sample_page.dart
@ -57,7 +57,7 @@ String expandTemplate(String template, Map<String, String> values) {
    if (match.groupCount != 1)
      throw new SampleError('bad template keyword $match[0]');
    final String keyword = match[1];
-    return (values[keyword] ?? "");
+    return (values[keyword] ?? '');
  });
 }

--- a/examples/catalog/test/animated_list_test.dart
+++ b/examples/catalog/test/animated_list_test.dart
@ -8,7 +8,7 @@ import 'package:flutter_test/flutter_test.dart';
 import '../lib/animated_list.dart' as animated_list_sample;

 void main() {
-  testWidgets("animated_list sample app smoke test", (WidgetTester tester) async {
+  testWidgets('animated_list sample app smoke test', (WidgetTester tester) async {
    animated_list_sample.main();
    await tester.pump();

--- a/examples/catalog/test/basic_app_bar_test.dart
+++ b/examples/catalog/test/basic_app_bar_test.dart
@ -20,7 +20,7 @@ Finder findChoiceCard(IconData icon) {
 }

 void main() {
-  testWidgets("basic_app_bar sample smoke test", (WidgetTester tester) async {
+  testWidgets('basic_app_bar sample smoke test', (WidgetTester tester) async {
    basic_app_bar_sample.main();
    await tester.pump();

--- a/examples/catalog/test/expansion_tile_sample_test.dart
+++ b/examples/catalog/test/expansion_tile_sample_test.dart
@ -9,7 +9,7 @@ import '../lib/expansion_tile_sample.dart' as expansion_tile_sample;
 import '../lib/expansion_tile_sample.dart' show Entry;

 void main() {
-  testWidgets("expansion_tile sample smoke test", (WidgetTester tester) async {
+  testWidgets('expansion_tile sample smoke test', (WidgetTester tester) async {
    expansion_tile_sample.main();
    await tester.pump();

--- a/examples/catalog/test/tabbed_app_bar_test.dart
+++ b/examples/catalog/test/tabbed_app_bar_test.dart
@ -19,7 +19,7 @@ Finder findTab(IconData icon) {
 }

 void main() {
-  testWidgets("tabbed_app_bar sample smoke test", (WidgetTester tester) async {
+  testWidgets('tabbed_app_bar sample smoke test', (WidgetTester tester) async {
    tabbed_app_bar_sample.main();
    await tester.pump();

--- a/examples/flutter_gallery/lib/demo/material/dialog_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/dialog_demo.dart
@ -13,11 +13,11 @@ enum DialogDemoAction {
  agree,
 }

-const String _alertWithoutTitleText = "Discard draft?";
+const String _alertWithoutTitleText = 'Discard draft?';

 const String _alertWithTitleText =
-  "Let Google help apps determine location. This means sending anyonmous location "
-  "data to Google, even when no apps are running.";
+  'Let Google help apps determine location. This means sending anyonmous location '
+  'data to Google, even when no apps are running.';

 class DialogDemoItem extends StatelessWidget {
  const DialogDemoItem({ Key key, this.icon, this.color, this.text, this.onPressed }) : super(key: key);
--- a/examples/flutter_gallery/lib/demo/material/expansion_panels_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/expansion_panels_demo.dart
@ -225,7 +225,7 @@ class _ExpansionPanelsDemoState extends State<ExpasionPanelsDemo> {
        name: 'Location',
        value: _Location.Bahamas,
        hint: 'Select location',
-        valueToString: (_Location location) => location.toString().split(".")[1],
+        valueToString: (_Location location) => location.toString().split('.')[1],
        builder: (DemoItem<_Location> item) {
          void close() {
            setState(() {
--- a/examples/flutter_gallery/lib/demo/material/list_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/list_demo.dart
@ -172,10 +172,10 @@ class _ListDemoState extends State<ListDemo> {
  Widget buildListTile(BuildContext context, String item) {
    Widget secondary;
    if (_itemType == _MaterialListType.twoLine) {
-      secondary = const Text("Additional item information.");
+      secondary = const Text('Additional item information.');
    } else if (_itemType == _MaterialListType.threeLine) {
      secondary = const Text(
-        "Even more additional list item information appears on line three.",
+        'Even more additional list item information appears on line three.',
      );
    }
    return new MergeSemantics(
@ -192,7 +192,7 @@ class _ListDemoState extends State<ListDemo> {

  @override
  Widget build(BuildContext context) {
-    final String layoutText = _dense ? " \u2013 Dense" : "";
+    final String layoutText = _dense ? ' \u2013 Dense' : '';
    String itemTypeText;
    switch (_itemType) {
      case _MaterialListType.oneLine:
--- a/examples/flutter_gallery/lib/demo/material/overscroll_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/overscroll_demo.dart
@ -29,7 +29,7 @@ class OverscrollDemoState extends State<OverscrollDemo> {
    new Timer(const Duration(seconds: 3), () { completer.complete(null); });
    return completer.future.then((_) {
       _scaffoldKey.currentState?.showSnackBar(new SnackBar(
-         content: const Text("Refresh complete"),
+         content: const Text('Refresh complete'),
         action: new SnackBarAction(
           label: 'RETRY',
           onPressed: () {
--- a/examples/flutter_gallery/lib/demo/material/selection_controls_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/selection_controls_demo.dart
@ -7,21 +7,21 @@ import 'package:flutter/material.dart';
 import '../../gallery/demo.dart';

 const String _checkboxText =
-  "Checkboxes allow the user to select multiple options from a set.";
+  'Checkboxes allow the user to select multiple options from a set.';

 const String _checkboxCode = 'selectioncontrols_checkbox';

 const String _radioText =
-  "Radio buttons allow the user to select one option from a set. Use radio "
-  "buttons for exclusive selection if you think that the user needs to see "
-  "all available options side-by-side.";
+  'Radio buttons allow the user to select one option from a set. Use radio '
+  'buttons for exclusive selection if you think that the user needs to see '
+  'all available options side-by-side.';

 const String _radioCode = 'selectioncontrols_radio';

 const String _switchText =
-  "On/off switches toggle the state of a single settings option. The option "
-  "that the switch controls, as well as the state it’s in, should be made "
-  "clear from the corresponding inline label.";
+  'On/off switches toggle the state of a single settings option. The option '
+  'that the switch controls, as well as the state it’s in, should be made '
+  'clear from the corresponding inline label.';

 const String _switchCode = 'selectioncontrols_switch';

@ -37,19 +37,19 @@ class _SelectionControlsDemoState extends State<SelectionControlsDemo> {
  Widget build(BuildContext context) {
    final List<ComponentDemoTabData> demos = <ComponentDemoTabData>[
      new ComponentDemoTabData(
-        tabName: "CHECKBOX",
+        tabName: 'CHECKBOX',
        description: _checkboxText,
        demoWidget: buildCheckbox(),
        exampleCodeTag: _checkboxCode
      ),
      new ComponentDemoTabData(
-        tabName: "RADIO",
+        tabName: 'RADIO',
        description: _radioText,
        demoWidget: buildRadio(),
        exampleCodeTag: _radioCode
      ),
      new ComponentDemoTabData(
-        tabName: "SWITCH",
+        tabName: 'SWITCH',
        description: _switchText,
        demoWidget: buildSwitch(),
        exampleCodeTag: _switchCode
--- a/examples/flutter_gallery/lib/demo/material/snack_bar_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/snack_bar_demo.dart
@ -5,16 +5,16 @@
 import 'package:flutter/material.dart';

 const String _text1 =
-  "Snackbars provide lightweight feedback about an operation by "
-  "showing a brief message at the bottom of the screen. Snackbars "
-  "can contain an action.";
+  'Snackbars provide lightweight feedback about an operation by '
+  'showing a brief message at the bottom of the screen. Snackbars '
+  'can contain an action.';

 const String _text2 =
-  "Snackbars should contain a single line of text directly related "
-  "to the operation performed. They cannot contain icons.";
+  'Snackbars should contain a single line of text directly related '
+  'to the operation performed. They cannot contain icons.';

 const String _text3 =
-  "By default snackbars automatically disappear after a few seconds ";
+  'By default snackbars automatically disappear after a few seconds ';

 class SnackBarDemo extends StatefulWidget {
  const SnackBarDemo({ Key key }) : super(key: key);
--- a/examples/flutter_gallery/lib/demo/material/tabs_fab_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/tabs_fab_demo.dart
@ -6,9 +6,9 @@ import 'package:flutter/material.dart';

 const String _explanatoryText =
  "When the Scaffold's floating action button changes, the new button fades and "
-  "turns into view. In this demo, changing tabs can cause the app to be rebuilt "
-  "with a FloatingActionButton that the Scaffold distinguishes from the others "
-  "by its key.";
+  'turns into view. In this demo, changing tabs can cause the app to be rebuilt '
+  'with a FloatingActionButton that the Scaffold distinguishes from the others '
+  'by its key.';

 class _Page {
  _Page({ this.label, this.colors, this.icon });
--- a/examples/flutter_gallery/lib/demo/material/tooltip_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/tooltip_demo.dart
@ -5,9 +5,9 @@
 import 'package:flutter/material.dart';

 const String _introText =
-  "Tooltips are short identifying messages that briefly appear in response to "
-  "a long press. Tooltip messages are also used by services that make Flutter "
-  "apps accessible, like screen readers.";
+  'Tooltips are short identifying messages that briefly appear in response to '
+  'a long press. Tooltip messages are also used by services that make Flutter '
+  'apps accessible, like screen readers.';

 class TooltipDemo extends StatelessWidget {

--- a/examples/flutter_gallery/lib/demo/pesto_demo.dart
+++ b/examples/flutter_gallery/lib/demo/pesto_demo.dart
@ -162,14 +162,14 @@ class _RecipeGridPageState extends State<RecipeGridPage> {

  void showFavoritesPage(BuildContext context) {
    Navigator.push(context, new MaterialPageRoute<Null>(
-      settings: const RouteSettings(name: "/pesto/favorites"),
+      settings: const RouteSettings(name: '/pesto/favorites'),
      builder: (BuildContext context) => new PestoFavorites(),
    ));
  }

  void showRecipePage(BuildContext context, Recipe recipe) {
    Navigator.push(context, new MaterialPageRoute<Null>(
-      settings: const RouteSettings(name: "/pesto/recipe"),
+      settings: const RouteSettings(name: '/pesto/recipe'),
      builder: (BuildContext context) {
        return new Theme(
          data: _kTheme.copyWith(platform: Theme.of(context).platform),
--- a/examples/flutter_gallery/lib/gallery/syntax_highlighter.dart
+++ b/examples/flutter_gallery/lib/gallery/syntax_highlighter.dart
@ -118,10 +118,10 @@ class DartSyntaxHighlighter extends SyntaxHighlighter {

    while (!_scanner.isDone) {
      // Skip White space
-      _scanner.scan(new RegExp(r"\s+"));
+      _scanner.scan(new RegExp(r'\s+'));

      // Block comments
-      if (_scanner.scan(new RegExp(r"/\*(.|\n)*\*/"))) {
+      if (_scanner.scan(new RegExp(r'/\*(.|\n)*\*/'))) {
        _spans.add(new _HighlightSpan(
          _HighlightType.comment,
          _scanner.lastMatch.start,
@ -131,12 +131,12 @@ class DartSyntaxHighlighter extends SyntaxHighlighter {
      }

      // Line comments
-      if (_scanner.scan("//")) {
+      if (_scanner.scan('//')) {
        final int startComment = _scanner.lastMatch.start;

        bool eof = false;
        int endComment;
-        if (_scanner.scan(new RegExp(r".*\n"))) {
+        if (_scanner.scan(new RegExp(r'.*\n'))) {
          endComment = _scanner.lastMatch.end - 1;
        } else {
          eof = true;
@ -216,7 +216,7 @@ class DartSyntaxHighlighter extends SyntaxHighlighter {
      }

      // Double
-      if (_scanner.scan(new RegExp(r"\d+\.\d+"))) {
+      if (_scanner.scan(new RegExp(r'\d+\.\d+'))) {
        _spans.add(new _HighlightSpan(
          _HighlightType.number,
          _scanner.lastMatch.start,
@ -226,7 +226,7 @@ class DartSyntaxHighlighter extends SyntaxHighlighter {
      }

      // Integer
-      if (_scanner.scan(new RegExp(r"\d+"))) {
+      if (_scanner.scan(new RegExp(r'\d+'))) {
        _spans.add(new _HighlightSpan(
          _HighlightType.number,
          _scanner.lastMatch.start,
@ -236,7 +236,7 @@ class DartSyntaxHighlighter extends SyntaxHighlighter {
      }

      // Punctuation
-      if (_scanner.scan(new RegExp(r"[\[\]{}().!=<>&\|\?\+\-\*/%\^~;:,]"))) {
+      if (_scanner.scan(new RegExp(r'[\[\]{}().!=<>&\|\?\+\-\*/%\^~;:,]'))) {
        _spans.add(new _HighlightSpan(
          _HighlightType.punctuation,
          _scanner.lastMatch.start,
@ -246,7 +246,7 @@ class DartSyntaxHighlighter extends SyntaxHighlighter {
      }

      // Meta data
-      if (_scanner.scan(new RegExp(r"@\w+"))) {
+      if (_scanner.scan(new RegExp(r'@\w+'))) {
        _spans.add(new _HighlightSpan(
          _HighlightType.keyword,
          _scanner.lastMatch.start,
@ -256,11 +256,11 @@ class DartSyntaxHighlighter extends SyntaxHighlighter {
      }

      // Words
-      if (_scanner.scan(new RegExp(r"\w+"))) {
+      if (_scanner.scan(new RegExp(r'\w+'))) {
        _HighlightType type;

        String word = _scanner.lastMatch[0];
-        if (word.startsWith("_"))
+        if (word.startsWith('_'))
          word = word.substring(1);

        if (_kKeywords.contains(word))
@ -269,7 +269,7 @@ class DartSyntaxHighlighter extends SyntaxHighlighter {
          type = _HighlightType.keyword;
        else if (_firstLetterIsUpperCase(word))
          type = _HighlightType.klass;
-        else if (word.length >= 2 && word.startsWith("k") && _firstLetterIsUpperCase(word.substring(1)))
+        else if (word.length >= 2 && word.startsWith('k') && _firstLetterIsUpperCase(word.substring(1)))
          type = _HighlightType.constant;

        if (type != null) {
--- a/examples/flutter_gallery/test/calculator/logic.dart
+++ b/examples/flutter_gallery/test/calculator/logic.dart
@ -16,7 +16,7 @@ void main() {
    expression = expression.appendDigit(4);
    expression = expression.computeResult();
    expect(expression.state, equals(ExpressionState.Result));
-    expect(expression.toString(), equals("24"));
+    expect(expression.toString(), equals('24'));
  });

  test('Test floating point 0.1 + 0.2 = 0.3', () {
@ -30,7 +30,7 @@ void main() {
    expression = expression.appendDigit(2);
    expression = expression.computeResult();
    expect(expression.state, equals(ExpressionState.Result));
-    expect(expression.toString(), equals("0.3"));
+    expect(expression.toString(), equals('0.3'));
  });

  test('Test floating point 1.0/10.0 = 0.1', () {
@ -45,7 +45,7 @@ void main() {
    expression = expression.appendDigit(0);
    expression = expression.computeResult();
    expect(expression.state, equals(ExpressionState.Result));
-    expect(expression.toString(), equals("0.1"));
+    expect(expression.toString(), equals('0.1'));
  });

  test('Test 1/0 = Infinity', () {
@ -55,7 +55,7 @@ void main() {
    expression = expression.appendDigit(0);
    expression = expression.computeResult();
    expect(expression.state, equals(ExpressionState.Result));
-    expect(expression.toString(), equals("Infinity"));
+    expect(expression.toString(), equals('Infinity'));
  });

  test('Test use result in next calculation: 1 + 1 = 2 + 1 = 3 + 1 = 4', () {
@ -71,7 +71,7 @@ void main() {
    expression = expression.appendDigit(1);
    expression = expression.computeResult();
    expect(expression.state, equals(ExpressionState.Result));
-    expect(expression.toString(), equals("4"));
+    expect(expression.toString(), equals('4'));
  });

  test('Test minus -3 - -2 = -1', () {
@ -83,6 +83,6 @@ void main() {
    expression = expression.appendDigit(2);
    expression = expression.computeResult();
    expect(expression.state, equals(ExpressionState.Result));
-    expect(expression.toString(), equals("-1"));
+    expect(expression.toString(), equals('-1'));
  });
 }
--- a/examples/flutter_gallery/test/drawer_test.dart
+++ b/examples/flutter_gallery/test/drawer_test.dart
@ -51,21 +51,21 @@ void main() {
    expect(app.theme.platform, equals(TargetPlatform.iOS));

    // Verify the font scale.
-    final Size origTextSize = tester.getSize(find.text("Small"));
+    final Size origTextSize = tester.getSize(find.text('Small'));
    expect(origTextSize, equals(const Size(176.0, 14.0)));

    // Switch font scale.
    await tester.tap(find.text('Small'));
    await tester.pump();
    await tester.pump(const Duration(seconds: 1)); // Wait until it's changed.
-    final Size textSize = tester.getSize(find.text("Small"));
+    final Size textSize = tester.getSize(find.text('Small'));
    expect(textSize, equals(const Size(176.0, 11.0)));

    // Set font scale back to default.
    await tester.tap(find.text('System Default'));
    await tester.pump();
    await tester.pump(const Duration(seconds: 1)); // Wait until it's changed.
-    final Size newTextSize = tester.getSize(find.text("Small"));
+    final Size newTextSize = tester.getSize(find.text('Small'));
    expect(newTextSize, equals(origTextSize));

    // Scroll to the bottom of the menu.
--- a/examples/flutter_gallery/test/example_code_parser_test.dart
+++ b/examples/flutter_gallery/test/example_code_parser_test.dart
@ -21,7 +21,7 @@ void main() {
  });
 }

-const String testCodeFile = """// A fake test file
+const String testCodeFile = '''// A fake test file
 // START test_0
 test 0 0
 test 0 1
@ -32,7 +32,7 @@ test 0 1
 test 1 0
 test 1 1
 // END
-""";
+''';

 class TestAssetBundle extends AssetBundle {
  @override
--- a/examples/flutter_view/lib/main.dart
+++ b/examples/flutter_view/lib/main.dart
@ -26,9 +26,9 @@ class MyHomePage extends StatefulWidget {
 }

 class _MyHomePageState extends State<MyHomePage> {
-  static const String _channel = "increment";
-  static const String _pong = "pong";
-  static const String _emptyMessage = "";
+  static const String _channel = 'increment';
+  static const String _pong = 'pong';
+  static const String _emptyMessage = '';
  static const BasicMessageChannel<String> platform =
      const BasicMessageChannel<String>(_channel, const StringCodec());

--- a/examples/hello_world/test/hello_test.dart
+++ b/examples/hello_world/test/hello_test.dart
@ -7,7 +7,7 @@ import 'package:flutter_test/flutter_test.dart';
 import '../lib/main.dart' as hello_world;

 void main() {
-  testWidgets("Hello world smoke test", (WidgetTester tester) async {
+  testWidgets('Hello world smoke test', (WidgetTester tester) async {
    hello_world.main(); // builds the app and schedules a frame but doesn't trigger one
    await tester.pump(); // triggers a frame

--- a/examples/layers/rendering/touch_input.dart
+++ b/examples/layers/rendering/touch_input.dart
@ -104,7 +104,7 @@ void main() {
  final RenderParagraph paragraph = new RenderParagraph(
    const TextSpan(
      style: const TextStyle(color: Colors.black87),
-      text: "Touch me!",
+      text: 'Touch me!',
    ),
    textDirection: TextDirection.ltr,
  );
--- a/examples/layers/services/isolate.dart
+++ b/examples/layers/services/isolate.dart
@ -46,21 +46,21 @@ class Calculator {
    try {
      final List<dynamic> result = decoder.convert(_data);
      final int n = result.length;
-      onResultListener("Decoded $n results");
+      onResultListener('Decoded $n results');
    } catch (e, stack) {
-      print("Invalid JSON file: $e");
+      print('Invalid JSON file: $e');
      print(stack);
    }
  }

  static String _replicateJson(String data, int count) {
-    final StringBuffer buffer = new StringBuffer()..write("[");
+    final StringBuffer buffer = new StringBuffer()..write('[');
    for (int i = 0; i < count; i++) {
      buffer.write(data);
      if (i < count - 1)
        buffer.write(',');
    }
-    buffer.write("]");
+    buffer.write(']');
    return buffer.toString();
  }
 }
--- a/examples/layers/widgets/styled_text.dart
+++ b/examples/layers/widgets/styled_text.dart
@ -24,7 +24,7 @@ final List<List<String>> _kNameLines = _kDialogText
  .toList();

 final TextStyle _kDaveStyle = new TextStyle(color: Colors.indigo.shade400, height: 1.8);
-final TextStyle _kHalStyle = new TextStyle(color: Colors.red.shade400, fontFamily: "monospace");
+final TextStyle _kHalStyle = new TextStyle(color: Colors.red.shade400, fontFamily: 'monospace');
 final TextStyle _kBold = const TextStyle(fontWeight: FontWeight.bold);
 final TextStyle _kUnderline = const TextStyle(
  decoration: TextDecoration.underline,
@ -33,7 +33,7 @@ final TextStyle _kUnderline = const TextStyle(
 );

 Widget toStyledText(String name, String text) {
-  final TextStyle lineStyle = (name == "Dave") ? _kDaveStyle : _kHalStyle;
+  final TextStyle lineStyle = (name == 'Dave') ? _kDaveStyle : _kHalStyle;
  return new RichText(
    key: new Key(text),
    text: new TextSpan(
@ -55,7 +55,7 @@ Widget toStyledText(String name, String text) {
  );
 }

-Widget toPlainText(String name, String text) => new Text(name + ":" + text);
+Widget toPlainText(String name, String text) => new Text(name + ':' + text);

 class SpeakerSeparator extends StatelessWidget {
  @override
--- a/examples/platform_channel/lib/main.dart
+++ b/examples/platform_channel/lib/main.dart
@ -27,7 +27,7 @@ class _PlatformChannelState extends State<PlatformChannel> {
      final int result = await methodChannel.invokeMethod('getBatteryLevel');
      batteryLevel = 'Battery level: $result%.';
    } on PlatformException {
-      batteryLevel = "Failed to get battery level.";
+      batteryLevel = 'Failed to get battery level.';
    }
    setState(() {
      _batteryLevel = batteryLevel;
@ -49,7 +49,7 @@ class _PlatformChannelState extends State<PlatformChannel> {

  void _onError(PlatformException error) {
    setState(() {
-      _chargingStatus = "Battery status: unknown.";
+      _chargingStatus = 'Battery status: unknown.';
    });
  }

--- a/examples/platform_channel_swift/lib/main.dart
+++ b/examples/platform_channel_swift/lib/main.dart
@ -27,7 +27,7 @@ class _PlatformChannelState extends State<PlatformChannel> {
      final int result = await methodChannel.invokeMethod('getBatteryLevel');
      batteryLevel = 'Battery level: $result%.';
    } on PlatformException {
-      batteryLevel = "Failed to get battery level.";
+      batteryLevel = 'Failed to get battery level.';
    }
    setState(() {
      _batteryLevel = batteryLevel;
@ -49,7 +49,7 @@ class _PlatformChannelState extends State<PlatformChannel> {

  void _onError(PlatformException error) {
    setState(() {
-      _chargingStatus = "Battery status: unknown.";
+      _chargingStatus = 'Battery status: unknown.';
    });
  }

--- a/examples/platform_view/lib/main.dart
+++ b/examples/platform_view/lib/main.dart
@ -35,7 +35,7 @@ class MyHomePage extends StatefulWidget {

 class _MyHomePageState extends State<MyHomePage> {
  static const MethodChannel _methodChannel =
-      const MethodChannel("samples.flutter.io/platform_view");
+      const MethodChannel('samples.flutter.io/platform_view');

  int _counter = 0;

@ -47,7 +47,7 @@ class _MyHomePageState extends State<MyHomePage> {

  Future<Null> _launchPlatformCount() async {
    final int platformCounter =
-        await _methodChannel.invokeMethod("switchView", _counter);
+        await _methodChannel.invokeMethod('switchView', _counter);
    setState(() {
      _counter = platformCounter;
    });
--- a/examples/stocks/lib/stock_home.dart
+++ b/examples/stocks/lib/stock_home.dart
@ -245,9 +245,9 @@ class StockHomeState extends State<StockHome> {
      stock.lastSale += 1.0;
    });
    _scaffoldKey.currentState.showSnackBar(new SnackBar(
-      content: new Text("Purchased ${stock.symbol} for ${stock.lastSale}"),
+      content: new Text('Purchased ${stock.symbol} for ${stock.lastSale}'),
      action: new SnackBarAction(
-        label: "BUY MORE",
+        label: 'BUY MORE',
        onPressed: () {
          _buyStock(stock);
        },
@ -278,7 +278,7 @@ class StockHomeState extends State<StockHome> {
    );
  }

-  static const List<String> portfolioSymbols = const <String>["AAPL","FIZZ", "FIVE", "FLAT", "ZINC", "ZNGA"];
+  static const List<String> portfolioSymbols = const <String>['AAPL','FIZZ', 'FIVE', 'FLAT', 'ZINC', 'ZNGA'];

  Widget buildSearchBar() {
    return new AppBar(
--- a/examples/stocks/lib/stock_row.dart
+++ b/examples/stocks/lib/stock_row.dart
@ -30,10 +30,10 @@ class StockRow extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
-    final String lastSale = "\$${stock.lastSale.toStringAsFixed(2)}";
-    String changeInPrice = "${stock.percentChange.toStringAsFixed(2)}%";
+    final String lastSale = '\$${stock.lastSale.toStringAsFixed(2)}';
+    String changeInPrice = '${stock.percentChange.toStringAsFixed(2)}%';
    if (stock.percentChange > 0)
-      changeInPrice = "+" + changeInPrice;
+      changeInPrice = '+' + changeInPrice;
    return new InkWell(
      onTap: _getHandler(onPressed),
      onDoubleTap: _getHandler(onDoubleTap),
--- a/examples/stocks/lib/stock_settings.dart
+++ b/examples/stocks/lib/stock_settings.dart
@ -68,8 +68,8 @@ class StockSettingsState extends State<StockSettings> {
        showDialog<bool>(
          context: context,
          child: new AlertDialog(
-            title: const Text("Change mode?"),
-            content: const Text("Optimistic mode means everything is awesome. Are you sure you can handle that?"),
+            title: const Text('Change mode?'),
+            content: const Text('Optimistic mode means everything is awesome. Are you sure you can handle that?'),
            actions: <Widget>[
              new FlatButton(
                child: const Text('NO THANKS'),
--- a/examples/stocks/lib/stock_symbol_viewer.dart
+++ b/examples/stocks/lib/stock_symbol_viewer.dart
@ -16,10 +16,10 @@ class _StockSymbolView extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    assert(stock != null);
-    final String lastSale = "\$${stock.lastSale.toStringAsFixed(2)}";
-    String changeInPrice = "${stock.percentChange.toStringAsFixed(2)}%";
+    final String lastSale = '\$${stock.lastSale.toStringAsFixed(2)}';
+    String changeInPrice = '${stock.percentChange.toStringAsFixed(2)}%';
    if (stock.percentChange > 0)
-      changeInPrice = "+" + changeInPrice;
+      changeInPrice = '+' + changeInPrice;

    final TextStyle headings = Theme.of(context).textTheme.body2;
    return new Container(
--- a/packages/flutter/lib/src/foundation/profile.dart
+++ b/packages/flutter/lib/src/foundation/profile.dart
@ -5,7 +5,7 @@
 import 'dart:ui';

 /// Whether we've been built in release mode.
-const bool _kReleaseMode = const bool.fromEnvironment("dart.vm.product");
+const bool _kReleaseMode = const bool.fromEnvironment('dart.vm.product');

 /// When running in profile mode (or debug mode), invoke the given function.
 ///
--- a/packages/flutter/lib/src/painting/colors.dart
+++ b/packages/flutter/lib/src/painting/colors.dart
@ -170,7 +170,7 @@ class HSVColor {
  int get hashCode => hashValues(alpha, hue, saturation, value);

  @override
-  String toString() => "HSVColor($alpha, $hue, $saturation, $value)";
+  String toString() => 'HSVColor($alpha, $hue, $saturation, $value)';
 }

 /// A color that has a small table of related colors called a "swatch".
--- a/packages/flutter/lib/src/rendering/sliver_multi_box_adaptor.dart
+++ b/packages/flutter/lib/src/rendering/sliver_multi_box_adaptor.dart
@ -578,7 +578,7 @@ abstract class RenderSliverMultiBoxAdaptor extends RenderSliver
      RenderBox child = firstChild;
      while (true) {
        final SliverMultiBoxAdaptorParentData childParentData = child.parentData;
-        children.add(child.toDiagnosticsNode(name: "child with index ${childParentData.index}"));
+        children.add(child.toDiagnosticsNode(name: 'child with index ${childParentData.index}'));
        if (child == lastChild)
          break;
        child = childParentData.nextSibling;
@ -588,7 +588,7 @@ abstract class RenderSliverMultiBoxAdaptor extends RenderSliver
      final List<int> indices = _keepAliveBucket.keys.toList()..sort();
      for (int index in indices) {
        children.add(_keepAliveBucket[index].toDiagnosticsNode(
-          name: "child with index $index (kept alive offstage)",
+          name: 'child with index $index (kept alive offstage)',
          style: DiagnosticsTreeStyle.offstage,
        ));
      }
--- a/packages/flutter/lib/src/rendering/stack.dart
+++ b/packages/flutter/lib/src/rendering/stack.dart
@ -134,7 +134,7 @@ class RelativeRect {
  int get hashCode => hashValues(left, top, right, bottom);

  @override
-  String toString() => "RelativeRect.fromLTRB(${left?.toStringAsFixed(1)}, ${top?.toStringAsFixed(1)}, ${right?.toStringAsFixed(1)}, ${bottom?.toStringAsFixed(1)})";
+  String toString() => 'RelativeRect.fromLTRB(${left?.toStringAsFixed(1)}, ${top?.toStringAsFixed(1)}, ${right?.toStringAsFixed(1)}, ${bottom?.toStringAsFixed(1)})';
 }

 /// Parent data for use with [RenderStack].
--- a/packages/flutter/lib/src/rendering/table.dart
+++ b/packages/flutter/lib/src/rendering/table.dart
@ -1167,7 +1167,7 @@ class RenderTable extends RenderBox {
    description.add(new DiagnosticsProperty<TableColumnWidth>('default column width', defaultColumnWidth));
    description.add(new MessageProperty('table size', '$columns\u00D7$rows'));
    description.add(new IterableProperty<double>('column offsets', _columnLefts, ifNull: 'unknown'));
-    description.add(new IterableProperty<double>('row offsets', _rowTops, ifNull: "unknown"));
+    description.add(new IterableProperty<double>('row offsets', _rowTops, ifNull: 'unknown'));
  }

  @override
--- a/packages/flutter/lib/src/services/image_resolution.dart
+++ b/packages/flutter/lib/src/services/image_resolution.dart
@ -246,7 +246,7 @@ class AssetImage extends AssetBundleImageProvider {
      return candidates[lower];
  }

-  static final RegExp _extractRatioRegExp = new RegExp(r"/?(\d+(\.\d*)?)x/");
+  static final RegExp _extractRatioRegExp = new RegExp(r'/?(\d+(\.\d*)?)x/');

  double _parseScale(String key) {
    final Match match = _extractRatioRegExp.firstMatch(key);
--- a/packages/flutter/lib/src/services/platform_channel.dart
+++ b/packages/flutter/lib/src/services/platform_channel.dart
@ -150,7 +150,7 @@ class MethodChannel {
      codec.encodeMethodCall(new MethodCall(method, arguments)),
    );
    if (result == null)
-      throw new MissingPluginException("No implementation found for method $method on channel $name");
+      throw new MissingPluginException('No implementation found for method $method on channel $name');
    return codec.decodeEnvelope(result);
  }

--- a/packages/flutter/lib/src/widgets/focus_manager.dart
+++ b/packages/flutter/lib/src/widgets/focus_manager.dart
@ -367,7 +367,7 @@ class FocusScopeNode extends Object with DiagnosticableTreeMixin {
      FocusScopeNode child = _firstChild;
      int count = 1;
      while (true) {
-        children.add(child.toDiagnosticsNode(name: "child $count"));
+        children.add(child.toDiagnosticsNode(name: 'child $count'));
        if (child == _lastChild)
          break;
        child = child._nextSibling;
--- a/packages/flutter/lib/src/widgets/framework.dart
+++ b/packages/flutter/lib/src/widgets/framework.dart
@ -3833,7 +3833,7 @@ class ParentDataElement<T extends RenderObjectWidget> extends ProxyElement {
      throw new FlutterError(
        'Incorrect use of ParentDataWidget.\n' +
        widget.debugDescribeInvalidAncestorChain(
-          description: "$this",
+          description: '$this',
          ownershipChain: parent.debugGetCreatorChain(10),
          foundValidAncestor: ancestor != null,
          badAncestors: badAncestors
--- a/packages/flutter/test/material/expansion_panel_test.dart
+++ b/packages/flutter/test/material/expansion_panel_test.dart
@ -71,7 +71,7 @@ void main() {
    box = tester.renderObject(find.byType(ExpansionPanelList));
    expect(box.size.height - oldHeight, greaterThanOrEqualTo(100.0)); // 100 + some margin
  });
-  testWidgets("Multiple Panel List test", (WidgetTester tester) async {
+  testWidgets('Multiple Panel List test', (WidgetTester tester) async {
    await tester.pumpWidget(
      new MaterialApp(
        home: new ListView(
--- a/packages/flutter/test/rendering/positioned_box_test.dart
+++ b/packages/flutter/test/rendering/positioned_box_test.dart
@ -16,8 +16,8 @@ void main() {
    final RenderPositionedBox positioner = new RenderPositionedBox(child: sizer);
    layout(positioner, constraints: new BoxConstraints.loose(const Size(200.0, 200.0)));

-    expect(positioner.size.width, equals(200.0), reason: "positioner width");
-    expect(positioner.size.height, equals(200.0), reason: "positioner height");
+    expect(positioner.size.width, equals(200.0), reason: 'positioner width');
+    expect(positioner.size.height, equals(200.0), reason: 'positioner height');
  });

  test('RenderPositionedBox shrink wraps', () {
@ -28,21 +28,21 @@ void main() {
    final RenderPositionedBox positioner = new RenderPositionedBox(child: sizer, widthFactor: 1.0);
    layout(positioner, constraints: new BoxConstraints.loose(const Size(200.0, 200.0)));

-    expect(positioner.size.width, equals(100.0), reason: "positioner width");
-    expect(positioner.size.height, equals(200.0), reason: "positioner height");
+    expect(positioner.size.width, equals(100.0), reason: 'positioner width');
+    expect(positioner.size.height, equals(200.0), reason: 'positioner height');

    positioner.widthFactor = null;
    positioner.heightFactor = 1.0;
    pumpFrame();

-    expect(positioner.size.width, equals(200.0), reason: "positioner width");
-    expect(positioner.size.height, equals(100.0), reason: "positioner height");
+    expect(positioner.size.width, equals(200.0), reason: 'positioner width');
+    expect(positioner.size.height, equals(100.0), reason: 'positioner height');

    positioner.widthFactor = 1.0;
    pumpFrame();

-    expect(positioner.size.width, equals(100.0), reason: "positioner width");
-    expect(positioner.size.height, equals(100.0), reason: "positioner height");
+    expect(positioner.size.width, equals(100.0), reason: 'positioner width');
+    expect(positioner.size.height, equals(100.0), reason: 'positioner height');
  });

  test('RenderPositionedBox width and height factors', () {
--- a/packages/flutter/test/rendering/semantics_test.dart
+++ b/packages/flutter/test/rendering/semantics_test.dart
@ -208,7 +208,7 @@ void main() {
      ..addAction(SemanticsAction.showOnScreen, () { })
      ..isChecked = false
      ..isSelected = true
-      ..label = "Use all the properties"
+      ..label = 'Use all the properties'
      ..textDirection = TextDirection.rtl;
    final SemanticsNode allProperties = new SemanticsNode()
      ..rect = new Rect.fromLTWH(50.0, 10.0, 20.0, 30.0)
--- a/packages/flutter/test/scheduler/animation_test.dart
+++ b/packages/flutter/test/scheduler/animation_test.dart
@ -13,11 +13,11 @@ class TestSchedulerBinding extends BindingBase with SchedulerBinding { }
 void main() {
  final SchedulerBinding scheduler = new TestSchedulerBinding();

-  test("Check for a time dilation being in effect", () {
+  test('Check for a time dilation being in effect', () {
    expect(timeDilation, equals(1.0));
  });

-  test("Can cancel queued callback", () {
+  test('Can cancel queued callback', () {
    int secondId;

    bool firstCallbackRan = false;
--- a/packages/flutter_driver/lib/src/error.dart
+++ b/packages/flutter_driver/lib/src/error.dart
@ -96,7 +96,7 @@ class LogRecord {
  ///
  /// It is meant to be read by humans. There's no guarantee that this value is
  /// stable enough to be parsed by machines.
-  String get levelDescription => level.toString().split(".").last;
+  String get levelDescription => level.toString().split('.').last;

  @override
  String toString() => '[${levelDescription.padRight(5)}] $loggerName: $message';
--- a/packages/flutter_localizations/lib/src/l10n/localizations.dart
+++ b/packages/flutter_localizations/lib/src/l10n/localizations.dart
@ -11,445 +11,445 @@
 ///
 /// This variable is used by [MaterialLocalizations].
 const Map<String, Map<String, String>> localizations = const <String, Map<String, String>> {
-  "ar": const <String, String>{
-    "scriptCategory": r"tall",
-    "timeOfDayFormat": r"h:mm a",
-    "openAppDrawerTooltip": r"افتح قائمة التنقل",
-    "backButtonTooltip": r"الى الخلف",
-    "closeButtonTooltip": r"إغلا",
-    "nextMonthTooltip": r"الشهر القادم",
-    "previousMonthTooltip": r"الشهر الماضى",
-    "nextPageTooltip": r"الصفحة التالية",
-    "previousPageTooltip": r"الصفحة السابقة",
-    "showMenuTooltip": r"قائمة العرض",
-    "aboutListTileTitle": r"حول $applicationName",
-    "licensesPageTitle": r"التّراخيص",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow أو $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow من حوالي $rowCount",
-    "rowsPerPageTitle": r"الصفوف في الصفحة:",
-    "selectedRowCountTitleOther": r"$selectedRowCount العناصر المحددة",
-    "cancelButtonLabel": r"إلغاء",
-    "closeButtonLabel": r"أغلاق",
-    "continueButtonLabel": r"استمر",
-    "copyButtonLabel": r"نسخ",
-    "cutButtonLabel": r"كِم جارح",
-    "okButtonLabel": r"حسنا",
-    "pasteButtonLabel": r"عجين",
-    "selectAllButtonLabel": r"اختر الكل",
-    "viewLicensesButtonLabel": r"عرض التراخيص",
-    "anteMeridiemAbbreviation": r"ص",
-    "postMeridiemAbbreviation": r"م",
+  'ar': const <String, String>{
+    'scriptCategory': r'tall',
+    'timeOfDayFormat': r'h:mm a',
+    'openAppDrawerTooltip': r'افتح قائمة التنقل',
+    'backButtonTooltip': r'الى الخلف',
+    'closeButtonTooltip': r'إغلا',
+    'nextMonthTooltip': r'الشهر القادم',
+    'previousMonthTooltip': r'الشهر الماضى',
+    'nextPageTooltip': r'الصفحة التالية',
+    'previousPageTooltip': r'الصفحة السابقة',
+    'showMenuTooltip': r'قائمة العرض',
+    'aboutListTileTitle': r'حول $applicationName',
+    'licensesPageTitle': r'التّراخيص',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow أو $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow من حوالي $rowCount',
+    'rowsPerPageTitle': r'الصفوف في الصفحة:',
+    'selectedRowCountTitleOther': r'$selectedRowCount العناصر المحددة',
+    'cancelButtonLabel': r'إلغاء',
+    'closeButtonLabel': r'أغلاق',
+    'continueButtonLabel': r'استمر',
+    'copyButtonLabel': r'نسخ',
+    'cutButtonLabel': r'كِم جارح',
+    'okButtonLabel': r'حسنا',
+    'pasteButtonLabel': r'عجين',
+    'selectAllButtonLabel': r'اختر الكل',
+    'viewLicensesButtonLabel': r'عرض التراخيص',
+    'anteMeridiemAbbreviation': r'ص',
+    'postMeridiemAbbreviation': r'م',
  },
-  "de": const <String, String>{
-    "scriptCategory": r"English-like",
-    "timeOfDayFormat": r"HH:mm",
-    "openAppDrawerTooltip": r"Navigationsmenü öffnen",
-    "backButtonTooltip": r"Zurück",
-    "closeButtonTooltip": r"Schließen",
-    "nextMonthTooltip": r"Nächster Monat",
-    "previousMonthTooltip": r"Vorheriger Monat",
-    "nextPageTooltip": r"Nächste Seite",
-    "previousPageTooltip": r"Vorherige Seite",
-    "showMenuTooltip": r"Menü anzeigen",
-    "aboutListTileTitle": r"Über $applicationName",
-    "licensesPageTitle": r"Lizenzen",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow von $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow von etwa $rowCount",
-    "rowsPerPageTitle": r"Zeilen pro Seite:",
-    "selectedRowCountTitleZero": r"Keine Objekte ausgewählt",
-    "selectedRowCountTitleOne": r"1 Objekt ausgewählt",
-    "selectedRowCountTitleOther": r"$selectedRowCount Objekte ausgewählt",
-    "cancelButtonLabel": r"ABBRECHEN",
-    "closeButtonLabel": r"SCHLIESSEN",
-    "continueButtonLabel": r"FORTSETZEN",
-    "copyButtonLabel": r"KOPIEREN",
-    "cutButtonLabel": r"AUSSCHNEIDEN",
-    "okButtonLabel": r"OK",
-    "pasteButtonLabel": r"EINFÜGEN",
-    "selectAllButtonLabel": r"ALLES AUSWÄHLEN",
-    "viewLicensesButtonLabel": r"LIZENZEN ANZEIGEN",
+  'de': const <String, String>{
+    'scriptCategory': r'English-like',
+    'timeOfDayFormat': r'HH:mm',
+    'openAppDrawerTooltip': r'Navigationsmenü öffnen',
+    'backButtonTooltip': r'Zurück',
+    'closeButtonTooltip': r'Schließen',
+    'nextMonthTooltip': r'Nächster Monat',
+    'previousMonthTooltip': r'Vorheriger Monat',
+    'nextPageTooltip': r'Nächste Seite',
+    'previousPageTooltip': r'Vorherige Seite',
+    'showMenuTooltip': r'Menü anzeigen',
+    'aboutListTileTitle': r'Über $applicationName',
+    'licensesPageTitle': r'Lizenzen',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow von $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow von etwa $rowCount',
+    'rowsPerPageTitle': r'Zeilen pro Seite:',
+    'selectedRowCountTitleZero': r'Keine Objekte ausgewählt',
+    'selectedRowCountTitleOne': r'1 Objekt ausgewählt',
+    'selectedRowCountTitleOther': r'$selectedRowCount Objekte ausgewählt',
+    'cancelButtonLabel': r'ABBRECHEN',
+    'closeButtonLabel': r'SCHLIESSEN',
+    'continueButtonLabel': r'FORTSETZEN',
+    'copyButtonLabel': r'KOPIEREN',
+    'cutButtonLabel': r'AUSSCHNEIDEN',
+    'okButtonLabel': r'OK',
+    'pasteButtonLabel': r'EINFÜGEN',
+    'selectAllButtonLabel': r'ALLES AUSWÄHLEN',
+    'viewLicensesButtonLabel': r'LIZENZEN ANZEIGEN',
  },
-  "en": const <String, String>{
-    "scriptCategory": r"English-like",
-    "timeOfDayFormat": r"h:mm a",
-    "openAppDrawerTooltip": r"Open navigation menu",
-    "backButtonTooltip": r"Back",
-    "closeButtonTooltip": r"Close",
-    "nextMonthTooltip": r"Next month",
-    "previousMonthTooltip": r"Previous month",
-    "nextPageTooltip": r"Next page",
-    "previousPageTooltip": r"Previous page",
-    "showMenuTooltip": r"Show menu",
-    "aboutListTileTitle": r"About $applicationName",
-    "licensesPageTitle": r"Licenses",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow of $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow of about $rowCount",
-    "rowsPerPageTitle": r"Rows per page:",
-    "selectedRowCountTitleZero": r"No items selected",
-    "selectedRowCountTitleOne": r"1 item selected",
-    "selectedRowCountTitleOther": r"$selectedRowCount items selected",
-    "cancelButtonLabel": r"CANCEL",
-    "closeButtonLabel": r"CLOSE",
-    "continueButtonLabel": r"CONTINUE",
-    "copyButtonLabel": r"COPY",
-    "cutButtonLabel": r"CUT",
-    "okButtonLabel": r"OK",
-    "pasteButtonLabel": r"PASTE",
-    "selectAllButtonLabel": r"SELECT ALL",
-    "viewLicensesButtonLabel": r"VIEW LICENSES",
-    "anteMeridiemAbbreviation": r"AM",
-    "postMeridiemAbbreviation": r"PM",
+  'en': const <String, String>{
+    'scriptCategory': r'English-like',
+    'timeOfDayFormat': r'h:mm a',
+    'openAppDrawerTooltip': r'Open navigation menu',
+    'backButtonTooltip': r'Back',
+    'closeButtonTooltip': r'Close',
+    'nextMonthTooltip': r'Next month',
+    'previousMonthTooltip': r'Previous month',
+    'nextPageTooltip': r'Next page',
+    'previousPageTooltip': r'Previous page',
+    'showMenuTooltip': r'Show menu',
+    'aboutListTileTitle': r'About $applicationName',
+    'licensesPageTitle': r'Licenses',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow of $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow of about $rowCount',
+    'rowsPerPageTitle': r'Rows per page:',
+    'selectedRowCountTitleZero': r'No items selected',
+    'selectedRowCountTitleOne': r'1 item selected',
+    'selectedRowCountTitleOther': r'$selectedRowCount items selected',
+    'cancelButtonLabel': r'CANCEL',
+    'closeButtonLabel': r'CLOSE',
+    'continueButtonLabel': r'CONTINUE',
+    'copyButtonLabel': r'COPY',
+    'cutButtonLabel': r'CUT',
+    'okButtonLabel': r'OK',
+    'pasteButtonLabel': r'PASTE',
+    'selectAllButtonLabel': r'SELECT ALL',
+    'viewLicensesButtonLabel': r'VIEW LICENSES',
+    'anteMeridiemAbbreviation': r'AM',
+    'postMeridiemAbbreviation': r'PM',
  },
-  "en_GB": const <String, String>{
-    "timeOfDayFormat": r"HH:mm",
+  'en_GB': const <String, String>{
+    'timeOfDayFormat': r'HH:mm',
  },
-  "en_IE": const <String, String>{
-    "timeOfDayFormat": r"HH:mm",
+  'en_IE': const <String, String>{
+    'timeOfDayFormat': r'HH:mm',
  },
-  "en_ZA": const <String, String>{
-    "timeOfDayFormat": r"HH:mm",
+  'en_ZA': const <String, String>{
+    'timeOfDayFormat': r'HH:mm',
  },
-  "es": const <String, String>{
-    "scriptCategory": r"English-like",
-    "timeOfDayFormat": r"H:mm",
-    "openAppDrawerTooltip": r"Abrir el menú de navegación",
-    "backButtonTooltip": r"Espalda",
-    "closeButtonTooltip": r"Cerrar",
-    "nextMonthTooltip": r"Próximo mes",
-    "previousMonthTooltip": r"Mes anterior",
-    "nextPageTooltip": r"Siguiente página",
-    "previousPageTooltip": r"Pagina anterior",
-    "showMenuTooltip": r"Muestrame el menu",
-    "aboutListTileTitle": r"Desarrollado por $applicationName",
-    "licensesPageTitle": r"Licencias",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow de $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow de aproximadamente $rowCount",
-    "rowsPerPageTitle": r"Filas por página:",
-    "selectedRowCountTitleZero": r"No se han seleccionado elementos",
-    "selectedRowCountTitleOne": r"1 artículo seleccionado",
-    "selectedRowCountTitleOther": r"$selectedRowCount artículos seleccionados",
-    "cancelButtonLabel": r"CANCELAR",
-    "closeButtonLabel": r"CERRAR",
-    "continueButtonLabel": r"CONTINUAR",
-    "copyButtonLabel": r"COPIAR",
-    "cutButtonLabel": r"CORTAR",
-    "okButtonLabel": r"OK",
-    "pasteButtonLabel": r"PEGAR",
-    "selectAllButtonLabel": r"SELECCIONAR TODO",
-    "viewLicensesButtonLabel": r"VER LICENCIAS",
+  'es': const <String, String>{
+    'scriptCategory': r'English-like',
+    'timeOfDayFormat': r'H:mm',
+    'openAppDrawerTooltip': r'Abrir el menú de navegación',
+    'backButtonTooltip': r'Espalda',
+    'closeButtonTooltip': r'Cerrar',
+    'nextMonthTooltip': r'Próximo mes',
+    'previousMonthTooltip': r'Mes anterior',
+    'nextPageTooltip': r'Siguiente página',
+    'previousPageTooltip': r'Pagina anterior',
+    'showMenuTooltip': r'Muestrame el menu',
+    'aboutListTileTitle': r'Desarrollado por $applicationName',
+    'licensesPageTitle': r'Licencias',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow de $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow de aproximadamente $rowCount',
+    'rowsPerPageTitle': r'Filas por página:',
+    'selectedRowCountTitleZero': r'No se han seleccionado elementos',
+    'selectedRowCountTitleOne': r'1 artículo seleccionado',
+    'selectedRowCountTitleOther': r'$selectedRowCount artículos seleccionados',
+    'cancelButtonLabel': r'CANCELAR',
+    'closeButtonLabel': r'CERRAR',
+    'continueButtonLabel': r'CONTINUAR',
+    'copyButtonLabel': r'COPIAR',
+    'cutButtonLabel': r'CORTAR',
+    'okButtonLabel': r'OK',
+    'pasteButtonLabel': r'PEGAR',
+    'selectAllButtonLabel': r'SELECCIONAR TODO',
+    'viewLicensesButtonLabel': r'VER LICENCIAS',
  },
-  "es_US": const <String, String>{
-    "timeOfDayFormat": r"h:mm a",
-    "anteMeridiemAbbreviation": r"AM",
-    "postMeridiemAbbreviation": r"PM",
+  'es_US': const <String, String>{
+    'timeOfDayFormat': r'h:mm a',
+    'anteMeridiemAbbreviation': r'AM',
+    'postMeridiemAbbreviation': r'PM',
  },
-  "fa": const <String, String>{
-    "scriptCategory": r"tall",
-    "timeOfDayFormat": r"H:mm",
-    "openAppDrawerTooltip": r"منوی ناوبری را باز کنید",
-    "backButtonTooltip": r"بازگشت",
-    "closeButtonTooltip": r"بستن",
-    "nextMonthTooltip": r"ماه بعد",
-    "previousMonthTooltip": r"ماه گذشته",
-    "nextPageTooltip": r"صفحه بعد",
-    "previousPageTooltip": r"صفحه قبلی",
-    "showMenuTooltip": r"نمایش منو",
-    "aboutListTileTitle": r"درباره $applicationName",
-    "licensesPageTitle": r"مجوز",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow از $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow از حدود $rowCount",
-    "rowsPerPageTitle": r"ردیف در صفحه:",
-    "selectedRowCountTitleOther": r"$selectedRowCount آیتم های انتخاب شده",
-    "cancelButtonLabel": r"لغو",
-    "closeButtonLabel": r"بستن",
-    "continueButtonLabel": r"ادامه دهید",
-    "copyButtonLabel": r"کپی",
-    "cutButtonLabel": r"برش",
-    "okButtonLabel": r"تایید",
-    "pasteButtonLabel": r"چسباندن",
-    "selectAllButtonLabel": r"انتخاب همه",
-    "viewLicensesButtonLabel": r"مشاهده مجوز",
+  'fa': const <String, String>{
+    'scriptCategory': r'tall',
+    'timeOfDayFormat': r'H:mm',
+    'openAppDrawerTooltip': r'منوی ناوبری را باز کنید',
+    'backButtonTooltip': r'بازگشت',
+    'closeButtonTooltip': r'بستن',
+    'nextMonthTooltip': r'ماه بعد',
+    'previousMonthTooltip': r'ماه گذشته',
+    'nextPageTooltip': r'صفحه بعد',
+    'previousPageTooltip': r'صفحه قبلی',
+    'showMenuTooltip': r'نمایش منو',
+    'aboutListTileTitle': r'درباره $applicationName',
+    'licensesPageTitle': r'مجوز',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow از $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow از حدود $rowCount',
+    'rowsPerPageTitle': r'ردیف در صفحه:',
+    'selectedRowCountTitleOther': r'$selectedRowCount آیتم های انتخاب شده',
+    'cancelButtonLabel': r'لغو',
+    'closeButtonLabel': r'بستن',
+    'continueButtonLabel': r'ادامه دهید',
+    'copyButtonLabel': r'کپی',
+    'cutButtonLabel': r'برش',
+    'okButtonLabel': r'تایید',
+    'pasteButtonLabel': r'چسباندن',
+    'selectAllButtonLabel': r'انتخاب همه',
+    'viewLicensesButtonLabel': r'مشاهده مجوز',
  },
-  "fr": const <String, String>{
-    "scriptCategory": r"English-like",
-    "timeOfDayFormat": r"HH:mm",
-    "openAppDrawerTooltip": r"Ouvrir le menu de navigation",
-    "backButtonTooltip": r"Retour",
-    "closeButtonTooltip": r"Fermer",
-    "nextMonthTooltip": r"Mois Suivant",
-    "previousMonthTooltip": r"Mois précédent",
-    "nextPageTooltip": r"Page suivante",
-    "previousPageTooltip": r"Page précédente",
-    "showMenuTooltip": r"Afficher le menu",
-    "aboutListTileTitle": r"À propos de $applicationName",
-    "licensesPageTitle": r"Licences",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow de $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow d'environ $rowCount",
-    "rowsPerPageTitle": r"Lignes par page:",
-    "selectedRowCountTitleZero": r"Aucun élément sélectionné",
-    "selectedRowCountTitleOne": r"1 élément sélectionné",
-    "selectedRowCountTitleOther": r"$selectedRowCount éléments sélectionnés",
-    "cancelButtonLabel": r"ANNULER",
-    "closeButtonLabel": r"FERMER",
-    "continueButtonLabel": r"CONTINUER",
-    "copyButtonLabel": r"COPIER",
-    "cutButtonLabel": r"COUPER",
-    "okButtonLabel": r"OK",
-    "pasteButtonLabel": r"COLLER",
-    "selectAllButtonLabel": r"TOUT SÉLECTIONNER",
-    "viewLicensesButtonLabel": r"AFFICHER LES LICENCES",
+  'fr': const <String, String>{
+    'scriptCategory': r'English-like',
+    'timeOfDayFormat': r'HH:mm',
+    'openAppDrawerTooltip': r'Ouvrir le menu de navigation',
+    'backButtonTooltip': r'Retour',
+    'closeButtonTooltip': r'Fermer',
+    'nextMonthTooltip': r'Mois Suivant',
+    'previousMonthTooltip': r'Mois précédent',
+    'nextPageTooltip': r'Page suivante',
+    'previousPageTooltip': r'Page précédente',
+    'showMenuTooltip': r'Afficher le menu',
+    'aboutListTileTitle': r'À propos de $applicationName',
+    'licensesPageTitle': r'Licences',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow de $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow d' "'" r'environ $rowCount',
+    'rowsPerPageTitle': r'Lignes par page:',
+    'selectedRowCountTitleZero': r'Aucun élément sélectionné',
+    'selectedRowCountTitleOne': r'1 élément sélectionné',
+    'selectedRowCountTitleOther': r'$selectedRowCount éléments sélectionnés',
+    'cancelButtonLabel': r'ANNULER',
+    'closeButtonLabel': r'FERMER',
+    'continueButtonLabel': r'CONTINUER',
+    'copyButtonLabel': r'COPIER',
+    'cutButtonLabel': r'COUPER',
+    'okButtonLabel': r'OK',
+    'pasteButtonLabel': r'COLLER',
+    'selectAllButtonLabel': r'TOUT SÉLECTIONNER',
+    'viewLicensesButtonLabel': r'AFFICHER LES LICENCES',
  },
-  "fr_CA": const <String, String>{
-    "timeOfDayFormat": r"HH 'h' mm",
+  'fr_CA': const <String, String>{
+    'timeOfDayFormat': r'HH ' "'" r'h' "'" r' mm',
  },
-  "he": const <String, String>{
-    "scriptCategory": r"English-like",
-    "timeOfDayFormat": r"H:mm",
-    "openAppDrawerTooltip": r"פתח תפריט ניווט",
-    "backButtonTooltip": r"אחורה",
-    "closeButtonTooltip": r"סגור",
-    "nextMonthTooltip": r"חודש הבא",
-    "previousMonthTooltip": r"חודש קודם",
-    "nextPageTooltip": r"עמוד הבא",
-    "previousPageTooltip": r"עמוד קודם",
-    "showMenuTooltip": r"הצג תפריט",
-    "aboutListTileTitle": r"על $applicationName",
-    "licensesPageTitle": r"רישיונות",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow מתוך $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow מתוך כ $rowCount",
-    "rowsPerPageTitle": r"שורות לעמוד:",
-    "selectedRowCountTitleOther": r"$selectedRowCount פריטים שנבחרו",
-    "cancelButtonLabel": r"ביטול",
-    "closeButtonLabel": r"סגור",
-    "continueButtonLabel": r"המשך",
-    "copyButtonLabel": r"העתק",
-    "cutButtonLabel": r"גזור",
-    "okButtonLabel": r"אישור",
-    "pasteButtonLabel": r"הדבק",
-    "selectAllButtonLabel": r"בחר הכל",
-    "viewLicensesButtonLabel": r"הצג רישיונות",
+  'he': const <String, String>{
+    'scriptCategory': r'English-like',
+    'timeOfDayFormat': r'H:mm',
+    'openAppDrawerTooltip': r'פתח תפריט ניווט',
+    'backButtonTooltip': r'אחורה',
+    'closeButtonTooltip': r'סגור',
+    'nextMonthTooltip': r'חודש הבא',
+    'previousMonthTooltip': r'חודש קודם',
+    'nextPageTooltip': r'עמוד הבא',
+    'previousPageTooltip': r'עמוד קודם',
+    'showMenuTooltip': r'הצג תפריט',
+    'aboutListTileTitle': r'על $applicationName',
+    'licensesPageTitle': r'רישיונות',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow מתוך $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow מתוך כ $rowCount',
+    'rowsPerPageTitle': r'שורות לעמוד:',
+    'selectedRowCountTitleOther': r'$selectedRowCount פריטים שנבחרו',
+    'cancelButtonLabel': r'ביטול',
+    'closeButtonLabel': r'סגור',
+    'continueButtonLabel': r'המשך',
+    'copyButtonLabel': r'העתק',
+    'cutButtonLabel': r'גזור',
+    'okButtonLabel': r'אישור',
+    'pasteButtonLabel': r'הדבק',
+    'selectAllButtonLabel': r'בחר הכל',
+    'viewLicensesButtonLabel': r'הצג רישיונות',
  },
-  "it": const <String, String>{
-    "scriptCategory": r"English-like",
-    "timeOfDayFormat": r"HH:mm",
-    "openAppDrawerTooltip": r"Apri il menu di navigazione",
-    "backButtonTooltip": r"Indietro",
-    "closeButtonTooltip": r"Chiudi",
-    "nextMonthTooltip": r"Il prossimo mese",
-    "previousMonthTooltip": r"Il mese scorso",
-    "nextPageTooltip": r"Pagina successiva",
-    "previousPageTooltip": r"Pagina precedente",
-    "showMenuTooltip": r"Mostra il menu",
-    "aboutListTileTitle": r"A proposito di $applicationName",
-    "licensesPageTitle": r"Licenze",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow di $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow di circa $rowCount",
-    "rowsPerPageTitle": r"Righe per pagina:",
-    "selectedRowCountTitleOther": r"$selectedRowCount selezionati",
-    "cancelButtonLabel": r"ANNULLA",
-    "closeButtonLabel": r"CHIUDI",
-    "continueButtonLabel": r"CONTINUA",
-    "copyButtonLabel": r"COPIA",
-    "cutButtonLabel": r"TAGLIA",
-    "okButtonLabel": r"OK",
-    "pasteButtonLabel": r"INCOLLA",
-    "selectAllButtonLabel": r"SELEZIONA TUTTO",
-    "viewLicensesButtonLabel": r"VEDI LE LICENZE",
+  'it': const <String, String>{
+    'scriptCategory': r'English-like',
+    'timeOfDayFormat': r'HH:mm',
+    'openAppDrawerTooltip': r'Apri il menu di navigazione',
+    'backButtonTooltip': r'Indietro',
+    'closeButtonTooltip': r'Chiudi',
+    'nextMonthTooltip': r'Il prossimo mese',
+    'previousMonthTooltip': r'Il mese scorso',
+    'nextPageTooltip': r'Pagina successiva',
+    'previousPageTooltip': r'Pagina precedente',
+    'showMenuTooltip': r'Mostra il menu',
+    'aboutListTileTitle': r'A proposito di $applicationName',
+    'licensesPageTitle': r'Licenze',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow di $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow di circa $rowCount',
+    'rowsPerPageTitle': r'Righe per pagina:',
+    'selectedRowCountTitleOther': r'$selectedRowCount selezionati',
+    'cancelButtonLabel': r'ANNULLA',
+    'closeButtonLabel': r'CHIUDI',
+    'continueButtonLabel': r'CONTINUA',
+    'copyButtonLabel': r'COPIA',
+    'cutButtonLabel': r'TAGLIA',
+    'okButtonLabel': r'OK',
+    'pasteButtonLabel': r'INCOLLA',
+    'selectAllButtonLabel': r'SELEZIONA TUTTO',
+    'viewLicensesButtonLabel': r'VEDI LE LICENZE',
  },
-  "ja": const <String, String>{
-    "scriptCategory": r"dense",
-    "timeOfDayFormat": r"H:mm",
-    "openAppDrawerTooltip": r"ナビゲーションメニューを開く",
-    "backButtonTooltip": r"戻る",
-    "closeButtonTooltip": r"閉じる",
-    "nextMonthTooltip": r"次の月へ",
-    "previousMonthTooltip": r"前の月へ",
-    "nextPageTooltip": r"次のページ",
-    "previousPageTooltip": r"前のページ",
-    "showMenuTooltip": r"メニューを表示",
-    "aboutListTileTitle": r"$applicationNameについて",
-    "licensesPageTitle": r"ライセンス",
-    "pageRowsInfoTitle": r"$rowCount行中の$firstRow–$lastRow",
-    "pageRowsInfoTitleApproximate": r"約$rowCount行中の$firstRow–$lastRow",
-    "rowsPerPageTitle": r"1ページあたりの行数：",
-    "selectedRowCountTitleOther": r"$selectedRowCount個のアイテムが選択されています",
-    "cancelButtonLabel": r"キャンセル",
-    "closeButtonLabel": r"閉じる",
-    "continueButtonLabel": r"次へ",
-    "copyButtonLabel": r"コピー",
-    "cutButtonLabel": r"カット",
-    "okButtonLabel": r"OK",
-    "pasteButtonLabel": r"貼付け",
-    "selectAllButtonLabel": r"全選択",
-    "viewLicensesButtonLabel": r"ライセンス表記",
+  'ja': const <String, String>{
+    'scriptCategory': r'dense',
+    'timeOfDayFormat': r'H:mm',
+    'openAppDrawerTooltip': r'ナビゲーションメニューを開く',
+    'backButtonTooltip': r'戻る',
+    'closeButtonTooltip': r'閉じる',
+    'nextMonthTooltip': r'次の月へ',
+    'previousMonthTooltip': r'前の月へ',
+    'nextPageTooltip': r'次のページ',
+    'previousPageTooltip': r'前のページ',
+    'showMenuTooltip': r'メニューを表示',
+    'aboutListTileTitle': r'$applicationNameについて',
+    'licensesPageTitle': r'ライセンス',
+    'pageRowsInfoTitle': r'$rowCount行中の$firstRow–$lastRow',
+    'pageRowsInfoTitleApproximate': r'約$rowCount行中の$firstRow–$lastRow',
+    'rowsPerPageTitle': r'1ページあたりの行数：',
+    'selectedRowCountTitleOther': r'$selectedRowCount個のアイテムが選択されています',
+    'cancelButtonLabel': r'キャンセル',
+    'closeButtonLabel': r'閉じる',
+    'continueButtonLabel': r'次へ',
+    'copyButtonLabel': r'コピー',
+    'cutButtonLabel': r'カット',
+    'okButtonLabel': r'OK',
+    'pasteButtonLabel': r'貼付け',
+    'selectAllButtonLabel': r'全選択',
+    'viewLicensesButtonLabel': r'ライセンス表記',
  },
-  "ps": const <String, String>{
-    "scriptCategory": r"tall",
-    "timeOfDayFormat": r"HH:mm",
-    "openAppDrawerTooltip": r"د پرانیستی نیینګ مینو",
-    "backButtonTooltip": r"شاته",
-    "closeButtonTooltip": r"بنده",
-    "nextMonthTooltip": r"بله میاشت",
-    "previousMonthTooltip": r"تیره میاشت",
-    "nextPageTooltip": r"بله پاڼه",
-    "previousPageTooltip": r"مخکینی مخ",
-    "showMenuTooltip": r"غورنۍ ښودل",
-    "aboutListTileTitle": r"د $applicationName په اړه",
-    "licensesPageTitle": r"جوازونه",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow د $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow څخه $rowCount د",
-    "rowsPerPageTitle": r"د هرې پاڼې پاڼې:",
-    "selectedRowCountTitleOther": r"$selectedRowCount توکي غوره شوي",
-    "cancelButtonLabel": r"لغوه کول",
-    "closeButtonLabel": r"تړل",
-    "continueButtonLabel": r"منځپانګې",
-    "copyButtonLabel": r"کاپی",
-    "cutButtonLabel": r"کم کړئ",
-    "okButtonLabel": r"سمه ده",
-    "pasteButtonLabel": r"پیټ کړئ",
-    "selectAllButtonLabel": r"غوره کړئ",
-    "viewLicensesButtonLabel": r"لیدلس وګورئ",
+  'ps': const <String, String>{
+    'scriptCategory': r'tall',
+    'timeOfDayFormat': r'HH:mm',
+    'openAppDrawerTooltip': r'د پرانیستی نیینګ مینو',
+    'backButtonTooltip': r'شاته',
+    'closeButtonTooltip': r'بنده',
+    'nextMonthTooltip': r'بله میاشت',
+    'previousMonthTooltip': r'تیره میاشت',
+    'nextPageTooltip': r'بله پاڼه',
+    'previousPageTooltip': r'مخکینی مخ',
+    'showMenuTooltip': r'غورنۍ ښودل',
+    'aboutListTileTitle': r'د $applicationName په اړه',
+    'licensesPageTitle': r'جوازونه',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow د $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow څخه $rowCount د',
+    'rowsPerPageTitle': r'د هرې پاڼې پاڼې:',
+    'selectedRowCountTitleOther': r'$selectedRowCount توکي غوره شوي',
+    'cancelButtonLabel': r'لغوه کول',
+    'closeButtonLabel': r'تړل',
+    'continueButtonLabel': r'منځپانګې',
+    'copyButtonLabel': r'کاپی',
+    'cutButtonLabel': r'کم کړئ',
+    'okButtonLabel': r'سمه ده',
+    'pasteButtonLabel': r'پیټ کړئ',
+    'selectAllButtonLabel': r'غوره کړئ',
+    'viewLicensesButtonLabel': r'لیدلس وګورئ',
  },
-  "pt": const <String, String>{
-    "scriptCategory": r"English-like",
-    "timeOfDayFormat": r"HH:mm",
-    "openAppDrawerTooltip": r"Abrir menu de navegação",
-    "backButtonTooltip": r"Costas",
-    "closeButtonTooltip": r"Fechar",
-    "nextMonthTooltip": r"Próximo mês",
-    "previousMonthTooltip": r"Mês anterior",
-    "nextPageTooltip": r"Próxima página",
-    "previousPageTooltip": r"Página anterior",
-    "showMenuTooltip": r"Mostrar menu",
-    "aboutListTileTitle": r"Sobre $applicationName",
-    "licensesPageTitle": r"Licenças",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow de $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow de cerca de $rowCount",
-    "rowsPerPageTitle": r"Linhas por página:",
-    "selectedRowCountTitleOther": r"$selectedRowCount selecionados",
-    "cancelButtonLabel": r"CANCELAR",
-    "closeButtonLabel": r"FECHAR",
-    "continueButtonLabel": r"CONTINUAR",
-    "copyButtonLabel": r"CÓPIA DE",
-    "cutButtonLabel": r"CORTA",
-    "okButtonLabel": r"OK",
-    "pasteButtonLabel": r"COLAR",
-    "selectAllButtonLabel": r"SELECIONAR TUDO",
-    "viewLicensesButtonLabel": r"VER LICENÇAS",
+  'pt': const <String, String>{
+    'scriptCategory': r'English-like',
+    'timeOfDayFormat': r'HH:mm',
+    'openAppDrawerTooltip': r'Abrir menu de navegação',
+    'backButtonTooltip': r'Costas',
+    'closeButtonTooltip': r'Fechar',
+    'nextMonthTooltip': r'Próximo mês',
+    'previousMonthTooltip': r'Mês anterior',
+    'nextPageTooltip': r'Próxima página',
+    'previousPageTooltip': r'Página anterior',
+    'showMenuTooltip': r'Mostrar menu',
+    'aboutListTileTitle': r'Sobre $applicationName',
+    'licensesPageTitle': r'Licenças',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow de $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow de cerca de $rowCount',
+    'rowsPerPageTitle': r'Linhas por página:',
+    'selectedRowCountTitleOther': r'$selectedRowCount selecionados',
+    'cancelButtonLabel': r'CANCELAR',
+    'closeButtonLabel': r'FECHAR',
+    'continueButtonLabel': r'CONTINUAR',
+    'copyButtonLabel': r'CÓPIA DE',
+    'cutButtonLabel': r'CORTA',
+    'okButtonLabel': r'OK',
+    'pasteButtonLabel': r'COLAR',
+    'selectAllButtonLabel': r'SELECIONAR TUDO',
+    'viewLicensesButtonLabel': r'VER LICENÇAS',
  },
-  "ru": const <String, String>{
-    "scriptCategory": r"English-like",
-    "timeOfDayFormat": r"H:mm",
-    "openAppDrawerTooltip": r"Открыть меню навигации",
-    "backButtonTooltip": r"Назад",
-    "closeButtonTooltip": r"Закрыть",
-    "nextMonthTooltip": r"Следующий месяц",
-    "previousMonthTooltip": r"Предыдущий месяц",
-    "nextPageTooltip": r"Следущая страница",
-    "previousPageTooltip": r"Предыдущая страница",
-    "showMenuTooltip": r"Показать меню",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow из $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow из примерно $rowCount",
-    "rowsPerPageTitle": r"Строки на страницу:",
-    "aboutListTileTitle": r"O $applicationName",
-    "licensesPageTitle": r"Лицензии",
-    "selectedRowCountTitleZero": r"Строки не выбраны",
-    "selectedRowCountTitleOne": r"Выбрана 1 строка",
-    "selectedRowCountTitleOther": r"Выбрано $selectedRowCount строк",
-    "cancelButtonLabel": r"ОТМЕНИТЬ",
-    "closeButtonLabel": r"ЗАКРЫТЬ",
-    "continueButtonLabel": r"ПРОДОЛЖИТЬ",
-    "copyButtonLabel": r"СКОПИРОВАТЬ",
-    "cutButtonLabel": r"ВЫРЕЗАТЬ",
-    "okButtonLabel": r"ОК",
-    "pasteButtonLabel": r"ВСТАВИТЬ",
-    "selectAllButtonLabel": r"ВЫБРАТЬ ВСЁ",
-    "viewLicensesButtonLabel": r"ПРОСМОТРЕТЬ ЛИЦЕНЗИИ",
+  'ru': const <String, String>{
+    'scriptCategory': r'English-like',
+    'timeOfDayFormat': r'H:mm',
+    'openAppDrawerTooltip': r'Открыть меню навигации',
+    'backButtonTooltip': r'Назад',
+    'closeButtonTooltip': r'Закрыть',
+    'nextMonthTooltip': r'Следующий месяц',
+    'previousMonthTooltip': r'Предыдущий месяц',
+    'nextPageTooltip': r'Следущая страница',
+    'previousPageTooltip': r'Предыдущая страница',
+    'showMenuTooltip': r'Показать меню',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow из $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow из примерно $rowCount',
+    'rowsPerPageTitle': r'Строки на страницу:',
+    'aboutListTileTitle': r'O $applicationName',
+    'licensesPageTitle': r'Лицензии',
+    'selectedRowCountTitleZero': r'Строки не выбраны',
+    'selectedRowCountTitleOne': r'Выбрана 1 строка',
+    'selectedRowCountTitleOther': r'Выбрано $selectedRowCount строк',
+    'cancelButtonLabel': r'ОТМЕНИТЬ',
+    'closeButtonLabel': r'ЗАКРЫТЬ',
+    'continueButtonLabel': r'ПРОДОЛЖИТЬ',
+    'copyButtonLabel': r'СКОПИРОВАТЬ',
+    'cutButtonLabel': r'ВЫРЕЗАТЬ',
+    'okButtonLabel': r'ОК',
+    'pasteButtonLabel': r'ВСТАВИТЬ',
+    'selectAllButtonLabel': r'ВЫБРАТЬ ВСЁ',
+    'viewLicensesButtonLabel': r'ПРОСМОТРЕТЬ ЛИЦЕНЗИИ',
  },
-  "sd": const <String, String>{
-    "scriptCategory": r"tall",
-    "timeOfDayFormat": r"HH:mm",
-    "openAppDrawerTooltip": r"اوپن جي مينڊيٽ مينيو",
-    "backButtonTooltip": r"پوئتي",
-    "closeButtonTooltip": r"بند ڪريو",
-    "nextMonthTooltip": r"ايندڙ مهيني",
-    "previousMonthTooltip": r"پويون مهينو",
-    "nextPageTooltip": r"اڳيون پيج",
-    "previousPageTooltip": r"پويون صفحو",
-    "showMenuTooltip": r"ڏيکاريو",
-    "aboutListTileTitle": r"$applicationName بابت",
-    "licensesPageTitle": r"لائسنس",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow جي $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow کان $rowCount تقريبن",
-    "rowsPerPageTitle": r"رني پاسي وارو صفحو",
-    "selectedRowCountTitleOther": r"$selectedRowCount شيون چونڊيل",
-    "cancelButtonLabel": r"منسوخ ڪيو",
-    "closeButtonLabel": r"بند ڪريو",
-    "continueButtonLabel": r"جاري رکو",
-    "copyButtonLabel": r"ڪاپي",
-    "cutButtonLabel": r"پٽي",
-    "okButtonLabel": r"ٺيڪ آهي",
-    "pasteButtonLabel": r"پيسٽ ڪريو",
-    "selectAllButtonLabel": r"سڀ چونڊيو",
-    "viewLicensesButtonLabel": r"لائسنس ڏسو",
+  'sd': const <String, String>{
+    'scriptCategory': r'tall',
+    'timeOfDayFormat': r'HH:mm',
+    'openAppDrawerTooltip': r'اوپن جي مينڊيٽ مينيو',
+    'backButtonTooltip': r'پوئتي',
+    'closeButtonTooltip': r'بند ڪريو',
+    'nextMonthTooltip': r'ايندڙ مهيني',
+    'previousMonthTooltip': r'پويون مهينو',
+    'nextPageTooltip': r'اڳيون پيج',
+    'previousPageTooltip': r'پويون صفحو',
+    'showMenuTooltip': r'ڏيکاريو',
+    'aboutListTileTitle': r'$applicationName بابت',
+    'licensesPageTitle': r'لائسنس',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow جي $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow کان $rowCount تقريبن',
+    'rowsPerPageTitle': r'رني پاسي وارو صفحو',
+    'selectedRowCountTitleOther': r'$selectedRowCount شيون چونڊيل',
+    'cancelButtonLabel': r'منسوخ ڪيو',
+    'closeButtonLabel': r'بند ڪريو',
+    'continueButtonLabel': r'جاري رکو',
+    'copyButtonLabel': r'ڪاپي',
+    'cutButtonLabel': r'پٽي',
+    'okButtonLabel': r'ٺيڪ آهي',
+    'pasteButtonLabel': r'پيسٽ ڪريو',
+    'selectAllButtonLabel': r'سڀ چونڊيو',
+    'viewLicensesButtonLabel': r'لائسنس ڏسو',
  },
-  "ur": const <String, String>{
-    "scriptCategory": r"tall",
-    "timeOfDayFormat": r"h:mm a",
-    "openAppDrawerTooltip": r"کھولیں نیویگیشن مینو",
-    "backButtonTooltip": r"واپس",
-    "closeButtonTooltip": r"بند کریں",
-    "nextMonthTooltip": r"اگلا مھینہ",
-    "previousMonthTooltip": r"پچھلا مھینہ",
-    "nextPageTooltip": r"اگلا صفحہ",
-    "previousPageTooltip": r"سابقہ صفحہ",
-    "showMenuTooltip": r"مینو دکھائیں",
-    "aboutListTileTitle": r"کے بارے میں $applicationName",
-    "licensesPageTitle": r"لائسنس",
-    "pageRowsInfoTitle": r"$firstRow–$lastRow کے $rowCount",
-    "pageRowsInfoTitleApproximate": r"$firstRow–$lastRow میں سے $rowCount تقریبا",
-    "rowsPerPageTitle": r"رویوں فی صفحہ:",
-    "selectedRowCountTitleOther": r"$selectedRowCount منتخب کردہ اشیاء",
-    "cancelButtonLabel": r"منسوخ کریں",
-    "closeButtonLabel": r"بند کریں",
-    "continueButtonLabel": r"جاری رکھیں",
-    "copyButtonLabel": r"کاپی",
-    "cutButtonLabel": r"کاٹیں",
-    "okButtonLabel": r"ٹھیک ہے",
-    "pasteButtonLabel": r"چسپاں",
-    "selectAllButtonLabel": r"تکاپیمام منتخب کریں",
-    "viewLicensesButtonLabel": r"لائسنس دیکھیں",
-    "anteMeridiemAbbreviation": r"AM",
-    "postMeridiemAbbreviation": r"PM",
+  'ur': const <String, String>{
+    'scriptCategory': r'tall',
+    'timeOfDayFormat': r'h:mm a',
+    'openAppDrawerTooltip': r'کھولیں نیویگیشن مینو',
+    'backButtonTooltip': r'واپس',
+    'closeButtonTooltip': r'بند کریں',
+    'nextMonthTooltip': r'اگلا مھینہ',
+    'previousMonthTooltip': r'پچھلا مھینہ',
+    'nextPageTooltip': r'اگلا صفحہ',
+    'previousPageTooltip': r'سابقہ صفحہ',
+    'showMenuTooltip': r'مینو دکھائیں',
+    'aboutListTileTitle': r'کے بارے میں $applicationName',
+    'licensesPageTitle': r'لائسنس',
+    'pageRowsInfoTitle': r'$firstRow–$lastRow کے $rowCount',
+    'pageRowsInfoTitleApproximate': r'$firstRow–$lastRow میں سے $rowCount تقریبا',
+    'rowsPerPageTitle': r'رویوں فی صفحہ:',
+    'selectedRowCountTitleOther': r'$selectedRowCount منتخب کردہ اشیاء',
+    'cancelButtonLabel': r'منسوخ کریں',
+    'closeButtonLabel': r'بند کریں',
+    'continueButtonLabel': r'جاری رکھیں',
+    'copyButtonLabel': r'کاپی',
+    'cutButtonLabel': r'کاٹیں',
+    'okButtonLabel': r'ٹھیک ہے',
+    'pasteButtonLabel': r'چسپاں',
+    'selectAllButtonLabel': r'تکاپیمام منتخب کریں',
+    'viewLicensesButtonLabel': r'لائسنس دیکھیں',
+    'anteMeridiemAbbreviation': r'AM',
+    'postMeridiemAbbreviation': r'PM',
  },
-  "zh": const <String, String>{
-    "scriptCategory": r"dense",
-    "timeOfDayFormat": r"ah:mm",
-    "openAppDrawerTooltip": r"打开导航菜单",
-    "backButtonTooltip": r"返回",
-    "closeButtonTooltip": r"关",
-    "nextMonthTooltip": r"-下月就29了。",
-    "previousMonthTooltip": r"前一个月",
-    "nextPageTooltip": r"下一页",
-    "previousPageTooltip": r"上一页",
-    "showMenuTooltip": r"显示菜单",
-    "aboutListTileTitle": r"关于$applicationName",
-    "licensesPageTitle": r"许可证",
-    "pageRowsInfoTitle": r"$rowCount中的$firstRow-$lastRow",
-    "pageRowsInfoTitleApproximate": r"约$rowCount中的$firstRow-$lastRow",
-    "rowsPerPageTitle": r"每页行数：",
-    "selectedRowCountTitleOther": r"$selectedRowCount行所选",
-    "cancelButtonLabel": r"取消",
-    "continueButtonLabel": r"继续",
-    "closeButtonLabel": r"关闭",
-    "copyButtonLabel": r"复制",
-    "cutButtonLabel": r"剪切",
-    "okButtonLabel": r"确定",
-    "pasteButtonLabel": r"粘贴",
-    "selectAllButtonLabel": r"全选",
-    "viewLicensesButtonLabel": r"查看许可证",
-    "anteMeridiemAbbreviation": r"上午",
-    "postMeridiemAbbreviation": r"下午",
+  'zh': const <String, String>{
+    'scriptCategory': r'dense',
+    'timeOfDayFormat': r'ah:mm',
+    'openAppDrawerTooltip': r'打开导航菜单',
+    'backButtonTooltip': r'返回',
+    'closeButtonTooltip': r'关',
+    'nextMonthTooltip': r'-下月就29了。',
+    'previousMonthTooltip': r'前一个月',
+    'nextPageTooltip': r'下一页',
+    'previousPageTooltip': r'上一页',
+    'showMenuTooltip': r'显示菜单',
+    'aboutListTileTitle': r'关于$applicationName',
+    'licensesPageTitle': r'许可证',
+    'pageRowsInfoTitle': r'$rowCount中的$firstRow-$lastRow',
+    'pageRowsInfoTitleApproximate': r'约$rowCount中的$firstRow-$lastRow',
+    'rowsPerPageTitle': r'每页行数：',
+    'selectedRowCountTitleOther': r'$selectedRowCount行所选',
+    'cancelButtonLabel': r'取消',
+    'continueButtonLabel': r'继续',
+    'closeButtonLabel': r'关闭',
+    'copyButtonLabel': r'复制',
+    'cutButtonLabel': r'剪切',
+    'okButtonLabel': r'确定',
+    'pasteButtonLabel': r'粘贴',
+    'selectAllButtonLabel': r'全选',
+    'viewLicensesButtonLabel': r'查看许可证',
+    'anteMeridiemAbbreviation': r'上午',
+    'postMeridiemAbbreviation': r'下午',
  },
 };

--- a/packages/flutter_localizations/lib/src/material_localizations.dart
+++ b/packages/flutter_localizations/lib/src/material_localizations.dart
@ -348,7 +348,7 @@ class GlobalMaterialLocalizations implements MaterialLocalizations {

  /// Looks up text geometry defined in [MaterialTextGeometry].
  @override
-  TextTheme get localTextGeometry => MaterialTextGeometry.forScriptCategory(_nameToValue["scriptCategory"]);
+  TextTheme get localTextGeometry => MaterialTextGeometry.forScriptCategory(_nameToValue['scriptCategory']);

  /// Creates an object that provides localized resource values for the
  /// for the widgets of the material library.
--- a/packages/flutter_test/lib/src/binding.dart
+++ b/packages/flutter_test/lib/src/binding.dart
@ -142,7 +142,7 @@ abstract class TestWidgetsFlutterBinding extends BindingBase
    createHttpClient = () {
      return new http.MockClient((http.BaseRequest request) {
        return new Future<http.Response>.value(
-          new http.Response("Mocked: Unavailable.", 404, request: request)
+          new http.Response('Mocked: Unavailable.', 404, request: request)
        );
      });
    };
--- a/packages/flutter_test/test/matchers_test.dart
+++ b/packages/flutter_test/test/matchers_test.dart
@ -26,7 +26,7 @@ class _MockToStringDeep {
  /// line break.
  List<String> _lines;

-  String toStringDeep({ String prefixLineOne: "", String prefixOtherLines: "" }) {
+  String toStringDeep({ String prefixLineOne: '', String prefixOtherLines: '' }) {
    final StringBuffer sb = new StringBuffer();
    if (_lines.isNotEmpty)
      sb.write('$prefixLineOne${_lines.first}');
--- a/packages/flutter_tools/bin/fuchsia_tester.dart
+++ b/packages/flutter_tools/bin/fuchsia_tester.dart
@ -26,9 +26,9 @@ import '../lib/src/usage.dart';

 // Note: this was largely inspired by lib/src/commands/test.dart.

-const String _kOptionPackages = "packages";
-const String _kOptionShell = "shell";
-const String _kOptionTestDirectory = "test-directory";
+const String _kOptionPackages = 'packages';
+const String _kOptionShell = 'shell';
+const String _kOptionTestDirectory = 'test-directory';
 const List<String> _kRequiredOptions = const <String>[
  _kOptionPackages,
  _kOptionShell,
--- a/packages/flutter_tools/lib/executable.dart
+++ b/packages/flutter_tools/lib/executable.dart
@ -175,7 +175,7 @@ Future<int> _handleToolError(
    writelnStderr();
    writelnStderr(
        "Run 'flutter -h' (or 'flutter <command> -h') for available "
-            "flutter commands and options."
+            'flutter commands and options.'
    );
    // Argument error exit code.
    return _exit(64);
--- a/packages/flutter_tools/lib/src/android/android_device.dart
+++ b/packages/flutter_tools/lib/src/android/android_device.dart
@ -772,7 +772,7 @@ class _AndroidDevicePortForwarder extends DevicePortForwarder {
    final List<String> lines = LineSplitter.split(stdout).toList();
    for (String line in lines) {
      if (line.startsWith(device.id)) {
-        final List<String> splitLine = line.split("tcp:");
+        final List<String> splitLine = line.split('tcp:');

        // Sanity check splitLine.
        if (splitLine.length != 3)
--- a/packages/flutter_tools/lib/src/android/gradle.dart
+++ b/packages/flutter_tools/lib/src/android/gradle.dart
@ -43,7 +43,7 @@ FlutterPluginVersion get flutterPluginVersion {
  final File plugin = fs.file('android/buildSrc/src/main/groovy/FlutterPlugin.groovy');
  if (plugin.existsSync()) {
    final String packageLine = plugin.readAsLinesSync().skip(4).first;
-    if (packageLine == "package io.flutter.gradle") {
+    if (packageLine == 'package io.flutter.gradle') {
      return FlutterPluginVersion.v2;
    }
    return FlutterPluginVersion.v1;
@ -51,7 +51,7 @@ FlutterPluginVersion get flutterPluginVersion {
  final File appGradle = fs.file('android/app/build.gradle');
  if (appGradle.existsSync()) {
    for (String line in appGradle.readAsLinesSync()) {
-      if (line.contains(new RegExp(r"apply from: .*/flutter.gradle"))) {
+      if (line.contains(new RegExp(r'apply from: .*/flutter.gradle'))) {
        return FlutterPluginVersion.managed;
      }
    }
--- a/packages/flutter_tools/lib/src/application_package.dart
+++ b/packages/flutter_tools/lib/src/application_package.dart
@ -116,7 +116,7 @@ class AndroidApk extends ApplicationPackage {
      if (category.getAttribute('android:name') == 'android.intent.category.LAUNCHER') {
        final xml.XmlElement activity = category.parent.parent;
        final String activityName = activity.getAttribute('android:name');
-        launchActivity = "$packageId/$activityName";
+        launchActivity = '$packageId/$activityName';
        break;
      }
    }
--- a/packages/flutter_tools/lib/src/base/common.dart
+++ b/packages/flutter_tools/lib/src/base/common.dart
@ -40,5 +40,5 @@ class ToolExit implements Exception {
  final int exitCode;

  @override
-  String toString() => "Exception: $message";
+  String toString() => 'Exception: $message';
 }
--- a/packages/flutter_tools/lib/src/base/os.dart
+++ b/packages/flutter_tools/lib/src/base/os.dart
@ -118,13 +118,13 @@ class _PosixUtils extends OperatingSystemUtils {
    if (_name == null) {
      if (platform.isMacOS) {
        final List<ProcessResult> results = <ProcessResult>[
-          processManager.runSync(<String>["sw_vers", "-productName"]),
-          processManager.runSync(<String>["sw_vers", "-productVersion"]),
-          processManager.runSync(<String>["sw_vers", "-buildVersion"]),
+          processManager.runSync(<String>['sw_vers', '-productName']),
+          processManager.runSync(<String>['sw_vers', '-productVersion']),
+          processManager.runSync(<String>['sw_vers', '-buildVersion']),
        ];
        if (results.every((ProcessResult result) => result.exitCode == 0)) {
-          _name = "${results[0].stdout.trim()} ${results[1].stdout
-              .trim()} ${results[2].stdout.trim()}";
+          _name = '${results[0].stdout.trim()} ${results[1].stdout
+              .trim()} ${results[2].stdout.trim()}';
        }
      }
      _name ??= super.name;
--- a/packages/flutter_tools/lib/src/base/process.dart
+++ b/packages/flutter_tools/lib/src/base/process.dart
@ -298,7 +298,7 @@ void _traceCommand(List<String> args, { String workingDirectory }) {
  if (workingDirectory == null)
    printTrace(argsText);
  else
-    printTrace("[$workingDirectory${fs.path.separator}] $argsText");
+    printTrace('[$workingDirectory${fs.path.separator}] $argsText');
 }

 String _runWithLoggingSync(List<String> cmd, {
--- a/packages/flutter_tools/lib/src/commands/build_aot.dart
+++ b/packages/flutter_tools/lib/src/commands/build_aot.dart
@ -239,10 +239,10 @@ Future<String> _buildAotSnapshot(
  ];

  if ((extraFrontEndOptions != null) && extraFrontEndOptions.isNotEmpty)
-    printTrace("Extra front-end options: $extraFrontEndOptions");
+    printTrace('Extra front-end options: $extraFrontEndOptions');

  if ((extraGenSnapshotOptions != null) && extraGenSnapshotOptions.isNotEmpty) {
-    printTrace("Extra gen-snapshot options: $extraGenSnapshotOptions");
+    printTrace('Extra gen-snapshot options: $extraGenSnapshotOptions');
    genSnapshotCmd.addAll(extraGenSnapshotOptions);
  }

--- a/packages/flutter_tools/lib/src/commands/create.dart
+++ b/packages/flutter_tools/lib/src/commands/create.dart
@ -83,7 +83,7 @@ class CreateCommand extends FlutterCommand {
    'If run on a project that already exists, this will repair the project, recreating any files that are missing.';

  @override
-  String get invocation => "${runner.executableName} $name <output directory>";
+  String get invocation => '${runner.executableName} $name <output directory>';

  @override
  Future<Null> runCommand() async {
@ -249,17 +249,17 @@ To edit platform code in an IDE see https://flutter.io/platform-plugins/#edit-co
      }
    } else {
      printStatus("You'll need to install additional components before you can run "
-        "your Flutter app:");
+        'your Flutter app:');
      printStatus('');

      // Give the user more detailed analysis.
      await doctor.diagnose();
      printStatus('');
      printStatus("After installing components, run 'flutter doctor' in order to "
-        "re-validate your setup.");
+        're-validate your setup.');
      printStatus("When complete, type 'flutter run' from the '$relativeAppPath' "
-        "directory in order to launch your app.");
-      printStatus("Your main program file is: $relativeAppPath/lib/main.dart");
+        'directory in order to launch your app.');
+      printStatus('Your main program file is: $relativeAppPath/lib/main.dart');
    }
  }

@ -290,7 +290,7 @@ To edit platform code in an IDE see https://flutter.io/platform-plugins/#edit-co
      'dartSdk': '$flutterRoot/bin/cache/dart-sdk',
      'androidMinApiLevel': android.minApiLevel,
      'androidSdkVersion': android_sdk.minimumAndroidSdkVersion,
-      'androidFlutterJar': "$flutterRoot/bin/cache/artifacts/engine/android-arm/flutter.jar",
+      'androidFlutterJar': '$flutterRoot/bin/cache/artifacts/engine/android-arm/flutter.jar',
      'withDriverTest': renderDriverTest,
      'pluginClass': pluginClass,
      'pluginDartClass': pluginDartClass,
@ -333,7 +333,7 @@ String _createPluginClassName(String name) {

 String _createUTIIdentifier(String organization, String name) {
  // Create a UTI (https://en.wikipedia.org/wiki/Uniform_Type_Identifier) from a base name
-  final RegExp disallowed = new RegExp(r"[^a-zA-Z0-9\-\.\u0080-\uffff]+");
+  final RegExp disallowed = new RegExp(r'[^a-zA-Z0-9\-\.\u0080-\uffff]+');
  name = camelCase(name).replaceAll(disallowed, '');
  name = name.isEmpty ? 'untitled' : name;
  return '$organization.$name';
@ -367,7 +367,7 @@ String _validateProjectName(String projectName) {

  if (_packageDependencies.contains(projectName)) {
    return "Invalid project name: '$projectName' - this will conflict with Flutter "
-      "package dependencies.";
+      'package dependencies.';
  }
  return null;
 }
@ -376,7 +376,7 @@ String _validateProjectName(String projectName) {
 /// if we should disallow the directory name.
 String _validateProjectDir(String dirPath, { String flutterRoot }) {
  if (fs.path.isWithin(flutterRoot, dirPath)) {
-    return "Cannot create a project within the Flutter SDK.\n"
+    return 'Cannot create a project within the Flutter SDK.\n'
      "Target directory '$dirPath' is within the Flutter SDK at '$flutterRoot'.";
  }

--- a/packages/flutter_tools/lib/src/commands/daemon.dart
+++ b/packages/flutter_tools/lib/src/commands/daemon.dart
@ -197,28 +197,28 @@ abstract class Domain {

  String _getStringArg(Map<String, dynamic> args, String name, { bool required: false }) {
    if (required && !args.containsKey(name))
-      throw "$name is required";
+      throw '$name is required';
    final dynamic val = args[name];
    if (val != null && val is! String)
-      throw "$name is not a String";
+      throw '$name is not a String';
    return val;
  }

  bool _getBoolArg(Map<String, dynamic> args, String name, { bool required: false }) {
    if (required && !args.containsKey(name))
-      throw "$name is required";
+      throw '$name is required';
    final dynamic val = args[name];
    if (val != null && val is! bool)
-      throw "$name is not a bool";
+      throw '$name is not a bool';
    return val;
  }

  int _getIntArg(Map<String, dynamic> args, String name, { bool required: false }) {
    if (required && !args.containsKey(name))
-      throw "$name is required";
+      throw '$name is required';
    final dynamic val = args[name];
    if (val != null && val is! int)
-      throw "$name is not an int";
+      throw '$name is not an int';
    return val;
  }

--- a/packages/flutter_tools/lib/src/commands/devices.dart
+++ b/packages/flutter_tools/lib/src/commands/devices.dart
@ -23,7 +23,7 @@ class DevicesCommand extends FlutterCommand {
    if (!doctor.canListAnything) {
      throwToolExit(
        "Unable to locate a development device; please run 'flutter doctor' for "
-        "information about installing additional components.",
+        'information about installing additional components.',
        exitCode: 1);
    }

--- a/packages/flutter_tools/lib/src/commands/format.dart
+++ b/packages/flutter_tools/lib/src/commands/format.dart
@ -21,7 +21,7 @@ class FormatCommand extends FlutterCommand {
  final String description = 'Format one or more dart files.';

  @override
-  String get invocation => "${runner.executableName} $name <one or more paths>";
+  String get invocation => '${runner.executableName} $name <one or more paths>';

  @override
  Future<Null> runCommand() async {
--- a/packages/flutter_tools/lib/src/commands/fuchsia_reload.dart
+++ b/packages/flutter_tools/lib/src/commands/fuchsia_reload.dart
@ -256,9 +256,9 @@ class FuchsiaReloadCommand extends FlutterCommand {

    // The Observatory requires somewhat non-standard URIs that the Uri class
    // can't build for us, so instead we build them by hand.
-    final String isolateIdQuery = "?isolateId=isolates%2F$number";
-    final String isolateAddr = "$vmServiceAddr/#/inspect$isolateIdQuery";
-    final String debuggerAddr = "$vmServiceAddr/#/debugger$isolateIdQuery";
+    final String isolateIdQuery = '?isolateId=isolates%2F$number';
+    final String isolateAddr = '$vmServiceAddr/#/inspect$isolateIdQuery';
+    final String debuggerAddr = '$vmServiceAddr/#/debugger$isolateIdQuery';

    final String newUsed = getSizeAsMB(isolate.newSpace.used);
    final String newCap = getSizeAsMB(isolate.newSpace.capacity);
@ -452,7 +452,7 @@ class _PortForwarder {
    final ProcessResult result = await processManager.run(command);
    printTrace(command.join(' '));
    if (result.exitCode != 0) {
-      printTrace("Command failed:\nstdout: ${result.stdout}\nstderr: ${result.stderr}");
+      printTrace('Command failed:\nstdout: ${result.stdout}\nstderr: ${result.stderr}');
    }
  }

@ -487,7 +487,7 @@ class FuchsiaDeviceCommandRunner {
    printTrace(args.join(' '));
    final ProcessResult result = await processManager.run(args);
    if (result.exitCode != 0) {
-      printStatus("Command failed: $command\nstdout: ${result.stdout}\nstderr: ${result.stderr}");
+      printStatus('Command failed: $command\nstdout: ${result.stdout}\nstderr: ${result.stderr}');
      return null;
    }
    printTrace(result.stdout);
--- a/packages/flutter_tools/lib/src/devfs.dart
+++ b/packages/flutter_tools/lib/src/devfs.dart
@ -498,10 +498,10 @@ class DevFS {
        try {
          await _httpWriter.write(dirtyEntries);
        } on SocketException catch (socketException, stackTrace) {
-          printTrace("DevFS sync failed. Lost connection to device: $socketException");
+          printTrace('DevFS sync failed. Lost connection to device: $socketException');
          throw new DevFSException('Lost connection to device.', socketException, stackTrace);
        } catch (exception, stackTrace) {
-          printError("Could not update files on device: $exception");
+          printError('Could not update files on device: $exception');
          throw new DevFSException('Sync failed', exception, stackTrace);
        }
      } else {
--- a/packages/flutter_tools/lib/src/device.dart
+++ b/packages/flutter_tools/lib/src/device.dart
@ -191,7 +191,7 @@ abstract class Device {

  // String meant to be displayed to the user indicating if the device is
  // supported by Flutter, and, if not, why.
-  String supportMessage() => isSupported() ? "Supported" : "Unsupported";
+  String supportMessage() => isSupported() ? 'Supported' : 'Unsupported';

  /// The device's platform.
  Future<TargetPlatform> get targetPlatform;
--- a/packages/flutter_tools/lib/src/ios/mac.dart
+++ b/packages/flutter_tools/lib/src/ios/mac.dart
@ -286,7 +286,7 @@ Future<XcodeBuildResult> buildXcodeProject({
      commands.addAll(<String>[
        '-workspace', fs.path.basename(entity.path),
        '-scheme', scheme,
-        "BUILD_DIR=${fs.path.absolute(getIosBuildDirectory())}",
+        'BUILD_DIR=${fs.path.absolute(getIosBuildDirectory())}',
      ]);
      break;
    }
@ -447,20 +447,20 @@ bool _checkXcodeVersion() {

 Future<Null> _addServicesToBundle(Directory bundle) async {
  final List<Map<String, String>> services = <Map<String, String>>[];
-  printTrace("Trying to resolve native pub services.");
+  printTrace('Trying to resolve native pub services.');

  // Step 1: Parse the service configuration yaml files present in the service
  //         pub packages.
  await parseServiceConfigs(services);
-  printTrace("Found ${services.length} service definition(s).");
+  printTrace('Found ${services.length} service definition(s).');

  // Step 2: Copy framework dylibs to the correct spot for xcodebuild to pick up.
-  final Directory frameworksDirectory = fs.directory(fs.path.join(bundle.path, "Frameworks"));
+  final Directory frameworksDirectory = fs.directory(fs.path.join(bundle.path, 'Frameworks'));
  await _copyServiceFrameworks(services, frameworksDirectory);

  // Step 3: Copy the service definitions manifest at the correct spot for
  //         xcodebuild to pick up.
-  final File manifestFile = fs.file(fs.path.join(bundle.path, "ServiceDefinitions.json"));
+  final File manifestFile = fs.file(fs.path.join(bundle.path, 'ServiceDefinitions.json'));
  _copyServiceDefinitionsManifest(services, manifestFile);
 }

@ -470,7 +470,7 @@ Future<Null> _copyServiceFrameworks(List<Map<String, String>> services, Director
  for (Map<String, String> service in services) {
    final String dylibPath = await getServiceFromUrl(service['ios-framework'], service['root'], service['name']);
    final File dylib = fs.file(dylibPath);
-    printTrace("Copying ${dylib.path} into bundle.");
+    printTrace('Copying ${dylib.path} into bundle.');
    if (!dylib.existsSync()) {
      printError("The service dylib '${dylib.path}' does not exist.");
      continue;
--- a/packages/flutter_tools/lib/src/ios/plist_utils.dart
+++ b/packages/flutter_tools/lib/src/ios/plist_utils.dart
@ -5,8 +5,8 @@
 import '../base/file_system.dart';
 import '../base/process.dart';

-const String kCFBundleIdentifierKey = "CFBundleIdentifier";
-const String kCFBundleShortVersionStringKey = "CFBundleShortVersionString";
+const String kCFBundleIdentifierKey = 'CFBundleIdentifier';
+const String kCFBundleShortVersionStringKey = 'CFBundleShortVersionString';

 String getValueFromFile(String plistFilePath, String key) {
  // TODO(chinmaygarde): For now, we only need to read from plist files on a mac
--- a/packages/flutter_tools/lib/src/run_hot.dart
+++ b/packages/flutter_tools/lib/src/run_hot.dart
@ -433,7 +433,7 @@ class HotRunner extends ResidentRunner {
        timer.stop();
        status.cancel();
        if (result.isOk)
-          printStatus("${result.message} in ${getElapsedAsMilliseconds(timer.elapsed)}.");
+          printStatus('${result.message} in ${getElapsedAsMilliseconds(timer.elapsed)}.');
        if (result.hint != null)
          printStatus(result.hint);
        return result;
@ -530,7 +530,7 @@ class HotRunner extends ResidentRunner {
        reloadMessage = 'Reloaded $loadedLibraryCount of $finalLibraryCount libraries';
      }
    } catch (error, st) {
-      printError("Hot reload failed: $error\n$st");
+      printError('Hot reload failed: $error\n$st');
      final int errorCode = error['code'];
      final String errorMessage = error['message'];
      if (errorCode == Isolate.kIsolateReloadBarred) {
@ -587,8 +587,8 @@ class HotRunner extends ResidentRunner {
        await view.uiIsolate.flutterReassemble();
      } on TimeoutException {
        reassembleTimedOut = true;
-        printTrace("Reassembling ${view.uiIsolate.name} took too long.");
-        printStatus("Hot reloading ${view.uiIsolate.name} took too long; the reload may have failed.");
+        printTrace('Reassembling ${view.uiIsolate.name} took too long.');
+        printStatus('Hot reloading ${view.uiIsolate.name} took too long; the reload may have failed.');
        continue;
      } catch (error) {
        reassembleAndScheduleErrors = true;
--- a/packages/flutter_tools/lib/src/runner/flutter_command.dart
+++ b/packages/flutter_tools/lib/src/runner/flutter_command.dart
@ -265,18 +265,18 @@ abstract class FlutterCommand extends Command<Null> {
  Future<List<Device>> findAllTargetDevices() async {
    if (!doctor.canLaunchAnything) {
      printError("Unable to locate a development device; please run 'flutter doctor' "
-          "for information about installing additional components.");
+          'for information about installing additional components.');
      return null;
    }

    List<Device> devices = await deviceManager.getDevices().toList();

    if (devices.isEmpty && deviceManager.hasSpecifiedDeviceId) {
-      printStatus("No devices found with name or id "
+      printStatus('No devices found with name or id '
          "matching '${deviceManager.specifiedDeviceId}'");
      return null;
    } else if (devices.isEmpty && deviceManager.hasSpecifiedAllDevices) {
-      printStatus("No devices found");
+      printStatus('No devices found');
      return null;
    } else if (devices.isEmpty) {
      printNoConnectedDevices();
@ -290,10 +290,10 @@ abstract class FlutterCommand extends Command<Null> {
      return null;
    } else if (devices.length > 1 && !deviceManager.hasSpecifiedAllDevices) {
      if (deviceManager.hasSpecifiedDeviceId) {
-        printStatus("Found ${devices.length} devices with name or id matching "
+        printStatus('Found ${devices.length} devices with name or id matching '
            "'${deviceManager.specifiedDeviceId}':");
      } else {
-        printStatus("More than one device connected; please specify a device with "
+        printStatus('More than one device connected; please specify a device with '
            "the '-d <deviceId>' flag, or use '-d all' to act on all devices.");
        devices = await deviceManager.getAllConnectedDevices().toList();
      }
@ -313,7 +313,7 @@ abstract class FlutterCommand extends Command<Null> {
    if (deviceList == null)
      return null;
    if (deviceList.length > 1) {
-      printStatus("More than one device connected; please specify a device with "
+      printStatus('More than one device connected; please specify a device with '
        "the '-d <deviceId>' flag.");
      deviceList = await deviceManager.getAllConnectedDevices().toList();
      printStatus('');
--- a/packages/flutter_tools/lib/src/services.dart
+++ b/packages/flutter_tools/lib/src/services.dart
@ -75,10 +75,10 @@ Future<Null> parseServiceConfigs(
 }

 Future<String> getServiceFromUrl(String url, String rootDir, String serviceName) async {
-  if (url.startsWith("android-sdk:") && androidSdk != null) {
+  if (url.startsWith('android-sdk:') && androidSdk != null) {
    // It's something shipped in the standard android SDK.
    return url.replaceAll('android-sdk:', '${androidSdk.directory}/');
-  } else if (url.startsWith("http")) {
+  } else if (url.startsWith('http')) {
    // It's a regular file to download.
    return await cache.getThirdPartyFile(url, serviceName);
  } else {
--- a/packages/flutter_tools/lib/src/template.dart
+++ b/packages/flutter_tools/lib/src/template.dart
@ -10,7 +10,7 @@ import 'globals.dart';

 const String _kTemplateExtension = '.tmpl';
 const String _kCopyTemplateExtension = '.copy.tmpl';
-final Pattern _kTemplateLanguageVariant = new RegExp(r"(\w+)-(\w+)\.tmpl.*");
+final Pattern _kTemplateLanguageVariant = new RegExp(r'(\w+)-(\w+)\.tmpl.*');

 /// Expands templates in a directory to a destination. All files that must
 /// undergo template expansion should end with the '.tmpl' extension. All other
--- a/packages/flutter_tools/lib/src/test/event_printer.dart
+++ b/packages/flutter_tools/lib/src/test/event_printer.dart
@ -15,8 +15,8 @@ class EventPrinter extends TestWatcher {

  @override
  void onStartedProcess(ProcessEvent event) {
-    _sendEvent("test.startedProcess",
-        <String, dynamic>{"observatoryUri": event.observatoryUri.toString()});
+    _sendEvent('test.startedProcess',
+        <String, dynamic>{'observatoryUri': event.observatoryUri.toString()});
  }

  void _sendEvent(String name, [dynamic params]) {
--- a/packages/flutter_tools/lib/src/test/flutter_platform.dart
+++ b/packages/flutter_tools/lib/src/test/flutter_platform.dart
@ -408,8 +408,8 @@ class _FlutterPlatform extends PlatformPlugin {

  String _getWebSocketUrl(HttpServer server) {
    return host.type == InternetAddressType.IP_V4
-        ? "ws://${host.address}:${server.port}"
-        : "ws://[${host.address}]:${server.port}";
+        ? 'ws://${host.address}:${server.port}'
+        : 'ws://[${host.address}]:${server.port}';
  }

  String _generateTestMain({
--- a/packages/flutter_tools/lib/src/test/runner.dart
+++ b/packages/flutter_tools/lib/src/test/runner.dart
@ -44,11 +44,11 @@ Future<int> runTests(
  }

  for (String name in names) {
-    testArgs..add("--name")..add(name);
+    testArgs..add('--name')..add(name);
  }

  for (String plainName in plainNames) {
-    testArgs..add("--plain-name")..add(plainName);
+    testArgs..add('--plain-name')..add(plainName);
  }

  testArgs.add('--');
--- a/packages/flutter_tools/lib/src/vmservice.dart
+++ b/packages/flutter_tools/lib/src/vmservice.dart
@ -321,7 +321,7 @@ abstract class ServiceObject {
      return null;

    if (!_isServiceMap(map))
-      throw new VMServiceObjectLoadError("Expected a service map", map);
+      throw new VMServiceObjectLoadError('Expected a service map', map);

    final String type = _stripRef(map['type']);

@ -435,7 +435,7 @@ abstract class ServiceObject {
    final String mapType = _stripRef(map['type']);

    if ((_type != null) && (_type != mapType)) {
-      throw new VMServiceObjectLoadError("ServiceObject types must not change",
+      throw new VMServiceObjectLoadError('ServiceObject types must not change',
                                         map);
    }
    _type = mapType;
@ -443,7 +443,7 @@ abstract class ServiceObject {

    _canCache = map['fixedId'] == true;
    if ((_id != null) && (_id != map['id']) && _canCache) {
-      throw new VMServiceObjectLoadError("ServiceObject id changed", map);
+      throw new VMServiceObjectLoadError('ServiceObject id changed', map);
    }
    _id = map['id'];

@ -1061,7 +1061,7 @@ class Isolate extends ServiceObjectOwner {
      if (ownerType == 'Library' || ownerType == '@Library')
        break;
      final String ownerName = owner['name'];
-      name = "$ownerName.$name";
+      name = '$ownerName.$name';
      owner = owner['owner'];
    }

--- a/packages/flutter_tools/test/asset_bundle_package_fonts_test.dart
+++ b/packages/flutter_tools/test/asset_bundle_package_fonts_test.dart
@ -47,7 +47,7 @@ $fontsSection
  }

  void writePackagesFile(String packages) {
-    fs.file(".packages")
+    fs.file('.packages')
      ..createSync()
      ..writeAsStringSync(packages);
  }
--- a/packages/flutter_tools/test/asset_bundle_package_test.dart
+++ b/packages/flutter_tools/test/asset_bundle_package_test.dart
@ -55,7 +55,7 @@ $assetsSection
  }

  void writePackagesFile(String packages) {
-    fs.file(".packages")
+    fs.file('.packages')
      ..createSync()
      ..writeAsStringSync(packages);
  }
@ -155,7 +155,7 @@ $assetsSection
        expectedAssetManifest,
      );
    }, overrides: contextOverrides);
-    
+
    testUsingContext("One asset is bundled when the package has one asset, listed in the app's pubspec", () async {
      establishFlutterRoot();

@ -180,7 +180,7 @@ $assetsSection
      );
    }, overrides: contextOverrides);

-    testUsingContext("One asset and its variant are bundled when the package has an asset and a variant, and lists the asset in its pubspec", () async {
+    testUsingContext('One asset and its variant are bundled when the package has an asset and a variant, and lists the asset in its pubspec', () async {
      establishFlutterRoot();

      writePubspecFile('pubspec.yaml', 'test');
@ -204,7 +204,7 @@ $assetsSection
      );
    }, overrides: contextOverrides);

-    testUsingContext("One asset and its variant are bundled when the package has an asset and a variant, and the app lists the asset in its pubspec", () async {
+    testUsingContext('One asset and its variant are bundled when the package has an asset and a variant, and the app lists the asset in its pubspec', () async {
      establishFlutterRoot();

      writePubspecFile(
@ -231,7 +231,7 @@ $assetsSection
      );
    }, overrides: contextOverrides);

-    testUsingContext("Two assets are bundled when the package has and lists two assets in its pubspec", () async {
+    testUsingContext('Two assets are bundled when the package has and lists two assets in its pubspec', () async {
      establishFlutterRoot();

      writePubspecFile('pubspec.yaml', 'test');
@ -288,7 +288,7 @@ $assetsSection
      );
    }, overrides: contextOverrides);

-    testUsingContext("Two assets are bundled when two packages each have and list an asset their pubspec", () async {
+    testUsingContext('Two assets are bundled when two packages each have and list an asset their pubspec', () async {
      establishFlutterRoot();

      writePubspecFile(
@ -323,7 +323,7 @@ $assetsSection
        expectedAssetManifest,
      );
    }, overrides: contextOverrides);
-    
+
    testUsingContext("Two assets are bundled when two packages each have an asset, listed in the app's pubspec", () async {
      establishFlutterRoot();

@ -363,7 +363,7 @@ $assetsSection
      );
    }, overrides: contextOverrides);

-    testUsingContext("One asset is bundled when the app depends on a package, listing in its pubspec an asset from another package", () async {
+    testUsingContext('One asset is bundled when the app depends on a package, listing in its pubspec an asset from another package', () async {
      establishFlutterRoot();
      writePubspecFile(
        'pubspec.yaml',
--- a/packages/flutter_tools/test/asset_bundle_variant_test.dart
+++ b/packages/flutter_tools/test/asset_bundle_variant_test.dart
@ -23,7 +23,7 @@ void main()  {
      // path separator.
      Cache.flutterRoot = getFlutterRoot();

-      fs.file("pubspec.yaml")
+      fs.file('pubspec.yaml')
        ..createSync()
        ..writeAsStringSync(
 '''
@ -36,7 +36,7 @@ flutter:
    - a/b/c/foo
 '''
      );
-      fs.file(".packages")..createSync();
+      fs.file('.packages')..createSync();

      final List<String> assets = <String>[
        'a/b/c/foo',
--- a/packages/flutter_tools/test/commands/create_test.dart
+++ b/packages/flutter_tools/test/commands/create_test.dart
@ -261,7 +261,7 @@ void main() {
      Cache.flutterRoot = '../..';
      final CreateCommand command = new CreateCommand();
      final CommandRunner<Null> runner = createTestCommandRunner(command);
-      final File existingFile = fs.file("${projectDir.path.toString()}/bad");
+      final File existingFile = fs.file('${projectDir.path.toString()}/bad');
      if (!existingFile.existsSync())
        existingFile.createSync(recursive: true);
      expect(
--- a/packages/flutter_tools/test/commands/packages_test.dart
+++ b/packages/flutter_tools/test/commands/packages_test.dart
@ -277,12 +277,12 @@ class MemoryIOSink implements IOSink {
  }

  @override
-  void writeln([Object obj = ""]) {
+  void writeln([Object obj = '']) {
    add(encoding.encode('$obj\n'));
  }

  @override
-  void writeAll(Iterable<dynamic> objects, [String separator = ""]) {
+  void writeAll(Iterable<dynamic> objects, [String separator = '']) {
    bool addSeparator = false;
    for (dynamic object in objects) {
      if (addSeparator) {