Remove errant double spaces (#110758)

dev/benchmarks/complex_layout/test/measure_scroll_smoothness.dart

@@ -181,7 +181,7 @@ Future<void> main() async {
 
 /// Calculates the smoothness measure from `scrollOffset` and `delays` list.
 ///
-/// Smoothness (`abs_jerk`) is measured by  the absolute value of the discrete
+/// Smoothness (`abs_jerk`) is measured by the absolute value of the discrete
 /// 2nd derivative of the scroll offset.
 ///
 /// It was experimented that jerk (3rd derivative of the position) is a good

dev/benchmarks/microbenchmarks/lib/foundation/platform_asset_bundle.dart

@@ -24,7 +24,7 @@ void main() async {
     watch.reset();
     watch.start();
     for (int i = 0; i < _kBatchSize; i += 1) {
-      // Note: We don't load images like this.  PlatformAssetBundle is used for
+      // Note: We don't load images like this. PlatformAssetBundle is used for
       // other assets (like Rive animations). We are using an image because it's
       // conveniently sized and available for the test.
       tally += (await bundle.load('packages/flutter_gallery_assets/places/india_pondicherry_salt_farm.png')).lengthInBytes;

dev/benchmarks/platform_channels_benchmarks/lib/main.dart

@@ -8,7 +8,6 @@ import 'dart:math' as math;
 import 'package:flutter/foundation.dart' show kDebugMode;
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-
 import 'package:microbenchmarks/common.dart';
 
 List<Object?> _makeTestBuffer(int size) {
@@ -195,7 +194,7 @@ Future<void> _runTests() async {
   );
 
   /// WARNING: Don't change the following line of code, it will invalidate
-  /// `Large` tests.  Instead make a different test.  The size of largeBuffer
+  /// `Large` tests. Instead make a different test. The size of largeBuffer
   /// serialized is 14214 bytes.
   final List<Object?> largeBuffer = _makeTestBuffer(1000);
   final ByteData largeBufferBytes =

dev/bots/analyze_snippet_code.dart

@@ -443,7 +443,7 @@ class _SnippetChecker {
 
   /// The directory for the dart:ui code to be analyzed with the flutter code.
   ///
-  /// If this is null, then no dart:ui code is included in the analysis.  It
+  /// If this is null, then no dart:ui code is included in the analysis. It
   /// defaults to the location inside of the flutter bin/cache directory that
   /// contains the dart:ui code supplied by the engine.
   final Directory? _dartUiLocation;

dev/bots/prepare_package.dart

@@ -185,7 +185,7 @@ typedef HttpReader = Future<Uint8List> Function(Uri url, {Map<String, String> he
 
 /// Creates a pre-populated Flutter archive from a git repo.
 class ArchiveCreator {
-  /// [tempDir] is the directory to use for creating the archive.  The script
+  /// [tempDir] is the directory to use for creating the archive. The script
   /// will place several GiB of data there, so it should have available space.
   ///
   /// The processManager argument is used to inject a mock of [ProcessManager] for
@@ -263,7 +263,7 @@ class ArchiveCreator {
   /// platform we're running on.
   final Platform platform;
 
-  /// The branch to build the archive for.  The branch must contain [revision].
+  /// The branch to build the archive for. The branch must contain [revision].
   final Branch branch;
 
   /// The git revision hash to build the archive for. This revision has
@@ -385,7 +385,7 @@ class ArchiveCreator {
   /// git will give an error.
   ///
   /// If [strict] is true, the exact [revision] must be tagged to return the
-  /// version.  If [strict] is not true, will look backwards in time starting at
+  /// version. If [strict] is not true, will look backwards in time starting at
   /// [revision] to find the most recent version tag.
   ///
   /// The version found as a git tag is added to the information given by

dev/bots/test.dart

@@ -186,7 +186,7 @@ const Map<String, List<String>> kWebTestFileKnownFailures = <String, List<String
 const String kTestHarnessShardName = 'test_harness_tests';
 const List<String> _kAllBuildModes = <String>['debug', 'profile', 'release'];
 
-// The seed used to shuffle tests.  If not passed with
+// The seed used to shuffle tests. If not passed with
 // --test-randomize-ordering-seed=<seed> on the command line, it will be set the
 // first time it is accessed. Pass zero to turn off shuffling.
 String? _shuffleSeed;

dev/bots/unpublish_package.dart

@@ -429,7 +429,7 @@ Future<void> main(List<String> rawArguments) async {
     'confirm',
     help: 'If set, will actually remove the archive from Google Cloud Storage '
         'upon successful execution of this script. Published archives will be '
-        'removed from this directory: $baseUrl$releaseFolder.  This option '
+        'removed from this directory: $baseUrl$releaseFolder. This option '
         'must be set to perform any action on the server, otherwise only a dry '
         'run is performed.',
   );
@@ -479,7 +479,7 @@ Future<void> main(List<String> rawArguments) async {
   }
 
   if (!(parsedArguments['confirm'] as bool)) {
-    _printBanner('This will be just a dry run.  To actually perform the changes below, re-run with --confirm argument.');
+    _printBanner('This will be just a dry run. To actually perform the changes below, re-run with --confirm argument.');
   }
 
   final List<String> channelArg = parsedArguments['channel'] as List<String>;
@@ -518,7 +518,7 @@ Future<void> main(List<String> rawArguments) async {
       errorExit('$message\n$stack', exitCode: exitCode);
     }
     if (!(parsedArguments['confirm'] as bool)) {
-      _printBanner('This was just a dry run.  To actually perform the above changes, re-run with --confirm argument.');
+      _printBanner('This was just a dry run. To actually perform the above changes, re-run with --confirm argument.');
     }
     exit(0);
   }

dev/integration_tests/flutter_gallery/lib/demo/material/chip_demo.dart

@@ -194,9 +194,9 @@ class _ChipDemoState extends State<ChipDemo> {
   }
 
   // This converts a String to a unique color, based on the hash value of the
-  // String object.  It takes the bottom 16 bits of the hash, and uses that to
+  // String object. It takes the bottom 16 bits of the hash, and uses that to
   // pick a hue for an HSV color, and then creates the color (with a preset
-  // saturation and value).  This means that any unique strings will also have
+  // saturation and value). This means that any unique strings will also have
   // unique colors, but they'll all be readable, since they have the same
   // saturation and value.
   Color _nameToColor(String name, ThemeData theme) {

dev/tools/dartdoc.dart

@@ -255,7 +255,7 @@ ArgParser _createArgsParser() {
       help: 'Show command help.');
   parser.addFlag('verbose', defaultsTo: true,
       help: 'Whether to report all error messages (on) or attempt to '
-          'filter out some known false positives (off).  Shut this off '
+          'filter out some known false positives (off). Shut this off '
           'locally if you want to address Flutter-specific issues.');
   parser.addFlag('checked', abbr: 'c',
       help: 'Run dartdoc in checked mode.');

dev/tools/localization/bin/gen_subtag_registry.dart

@@ -7,8 +7,8 @@ import 'dart:io';
 
 const String registry = 'https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry';
 
-/// A script to generate a Dart cache of https://www.iana.org.  This should be
+/// A script to generate a Dart cache of https://www.iana.org. This should be
-/// run occasionally.  It was created since iana.org was found to be flakey.
+/// run occasionally. It was created since iana.org was found to be flakey.
 ///
 /// To execute: dart gen_subtag_registry.dart > language_subtag_registry.dart
 Future<void> main() async {

examples/api/lib/animation/curves/curve2_d.0.dart

@@ -71,7 +71,7 @@ class _FollowCurve2DState extends State<FollowCurve2D>
     super.initState();
     controller = AnimationController(duration: widget.duration, vsync: this);
     animation = CurvedAnimation(parent: controller, curve: widget.curve);
-    // Have the controller repeat indefinitely.  If you want it to "bounce" back
+    // Have the controller repeat indefinitely. If you want it to "bounce" back
     // and forth, set the reverse parameter to true.
     controller.repeat();
     controller.addListener(() => setState(() {}));

examples/api/lib/material/text_field/text_field.2.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flutter code sample for  Material Design 3 TextFields.
+// Flutter code sample for Material Design 3 TextFields.
 
 import 'package:flutter/material.dart';
 

packages/flutter/lib/src/animation/curves.dart

@@ -508,7 +508,7 @@ abstract class Curve2D extends ParametricCurve<Offset> {
     double end = 1.0,
     double tolerance = 1e-10,
   }) {
-    // The sampling  algorithm is:
+    // The sampling algorithm is:
     // 1. Evaluate the area of the triangle (a proxy for the "flatness" of the
     //    curve) formed by two points and a test point.
     // 2. If the area of the triangle is small enough (below tolerance), then
@@ -675,7 +675,7 @@ class CatmullRomSpline extends Curve2D {
   /// interpolate.
   ///
   /// The internal curve data structures are lazily computed the first time
-  /// [transform] is called.  If you would rather pre-compute the structures,
+  /// [transform] is called. If you would rather pre-compute the structures,
   /// use [CatmullRomSpline.precompute] instead.
   CatmullRomSpline(
       List<Offset> controlPoints, {
@@ -851,7 +851,7 @@ class CatmullRomCurve extends Curve {
   /// is equivalent to a linear interpolation between points.
   ///
   /// The internal curve data structures are lazily computed the first time
-  /// [transform] is called.  If you would rather pre-compute the curve, use
+  /// [transform] is called. If you would rather pre-compute the curve, use
   /// [CatmullRomCurve.precompute] instead.
   ///
   /// All of the arguments must not be null.

packages/flutter/lib/src/cupertino/dialog.dart

@@ -918,7 +918,7 @@ class _CupertinoDialogRenderElement extends RenderObjectElement {
 //
 // If all content and buttons do not fit on screen, and iOS is NOT in accessibility mode:
 // A minimum height for the action button section is calculated. The action
-// button section will not be rendered shorter than this minimum.  See
+// button section will not be rendered shorter than this minimum. See
 // [_RenderCupertinoDialogActions] for the minimum height calculation.
 //
 // With the minimum action button section calculated, the content section can
@@ -1335,7 +1335,7 @@ enum _AlertDialogSections {
 
 // The "content section" of a CupertinoAlertDialog.
 //
-// If title is missing, then only content is added.  If content is
+// If title is missing, then only content is added. If content is
 // missing, then only title is added. If both are missing, then it returns
 // a SingleChildScrollView with a zero-sized Container.
 class _CupertinoAlertContentSection extends StatelessWidget {
@@ -2254,7 +2254,7 @@ class _RenderCupertinoDialogActions extends RenderBox
 
   void _drawButtonBackgroundsAndDividersSingleRow(Canvas canvas, Offset offset) {
     // The vertical divider sits between the left button and right button (if
-    // the dialog has 2 buttons).  The vertical divider is hidden if either the
+    // the dialog has 2 buttons). The vertical divider is hidden if either the
     // left or right button is pressed.
     final Rect verticalDivider = childCount == 2 && !_isButtonPressed
         ? Rect.fromLTWH(

packages/flutter/lib/src/cupertino/icons.dart

@@ -187,14 +187,14 @@ class CupertinoIcons {
   ///  * [check_mark_circled], which is similar, but not filled in.
   static const IconData check_mark_circled_solid = IconData(0xf3ff, fontFamily: iconFont, fontPackage: iconFontPackage);
 
-  /// <i class='cupertino-icons md-36'>circle</i> &#x2014; Cupertino icon for an empty circle (a ring).  An un-selected radio button.
+  /// <i class='cupertino-icons md-36'>circle</i> &#x2014; Cupertino icon for an empty circle (a ring). An un-selected radio button.
   ///
   /// See also:
   ///
   ///  * [circle_filled], which is similar but filled in.
   static const IconData circle = IconData(0xf401, fontFamily: iconFont, fontPackage: iconFontPackage);
 
-  /// <i class='cupertino-icons md-36'>circle_fill</i> &#x2014; Cupertino icon for a filled circle.  The circle is surrounded by a ring.  A selected radio button.
+  /// <i class='cupertino-icons md-36'>circle_fill</i> &#x2014; Cupertino icon for a filled circle. The circle is surrounded by a ring. A selected radio button.
   /// This is the same icon as [circle_fill] in cupertino_icons 1.0.0+.
   ///
   /// See also:

packages/flutter/lib/src/cupertino/picker.dart

@@ -66,8 +66,8 @@ class CupertinoPicker extends StatefulWidget {
   /// the current picker index or for selecting an initial index value.
   ///
   /// The [looping] argument decides whether the child list loops and can be
-  /// scrolled infinitely.  If set to true, scrolling past the end of the list
+  /// scrolled infinitely. If set to true, scrolling past the end of the list
-  /// will loop the list back to the beginning.  If set to false, the list will
+  /// will loop the list back to the beginning. If set to false, the list will
   /// stop scrolling when you reach the end or the beginning.
   CupertinoPicker({
     super.key,

packages/flutter/lib/src/cupertino/tab_scaffold.dart

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/widgets.dart';
+
 import 'bottom_tab_bar.dart';
 import 'colors.dart';
 import 'theme.dart';
@@ -457,7 +458,7 @@ class _TabSwitchingViewState extends State<_TabSwitchingView> {
     _focusActiveTab();
   }
 
-  // Will focus the active tab if the FocusScope above it has focus already.  If
+  // Will focus the active tab if the FocusScope above it has focus already. If
   // not, then it will just mark it as the preferred focus for that scope.
   void _focusActiveTab() {
     if (tabFocusNodes.length != widget.tabCount) {

packages/flutter/lib/src/foundation/binding.dart

@@ -6,6 +6,7 @@ import 'dart:convert' show json;
 import 'dart:developer' as developer;
 import 'dart:io' show exit;
 import 'dart:ui' as ui show Brightness, PlatformDispatcher, SingletonFlutterWindow, window;
+
 // Before adding any more dart:ui imports, please read the README.
 
 import 'package:meta/meta.dart';
@@ -178,8 +179,8 @@ abstract class BindingBase {
   /// Each of these other bindings could individually access a
   /// [ui.SingletonFlutterWindow] statically, but that would preclude the
   /// ability to test its behaviors with a fake window for verification
-  /// purposes.  Therefore, [BindingBase] exposes this
+  /// purposes. Therefore, [BindingBase] exposes this
-  /// [ui.SingletonFlutterWindow] for use by other bindings.  A subclass of
+  /// [ui.SingletonFlutterWindow] for use by other bindings. A subclass of
   /// [BindingBase], such as [TestWidgetsFlutterBinding], can override this
   /// accessor to return a different [ui.SingletonFlutterWindow] implementation,
   /// such as a [TestWindow].

packages/flutter/lib/src/material/app_bar.dart

@@ -485,7 +485,7 @@ class AppBar extends StatefulWidget implements PreferredSizeWidget {
   /// The shape of the app bar's [Material] as well as its shadow.
   ///
   /// If this property is null, then [AppBarTheme.shape] of
-  /// [ThemeData.appBarTheme] is used.  Both properties default to null.
+  /// [ThemeData.appBarTheme] is used. Both properties default to null.
   /// If both properties are null then the shape of the app bar's [Material]
   /// is just a simple rectangle.
   ///
@@ -561,7 +561,7 @@ class AppBar extends StatefulWidget implements PreferredSizeWidget {
   ///
   /// The AppBar is built within a `AnnotatedRegion<SystemUiOverlayStyle>`
   /// which causes [SystemChrome.setSystemUIOverlayStyle] to be called
-  /// automatically.  Apps should not enclose the AppBar with
+  /// automatically. Apps should not enclose the AppBar with
   /// their own [AnnotatedRegion].
   /// {@endtemplate}
   ///
@@ -780,7 +780,7 @@ class AppBar extends StatefulWidget implements PreferredSizeWidget {
   /// The AppBar's descendants are built within a
   /// `AnnotatedRegion<SystemUiOverlayStyle>` widget, which causes
   /// [SystemChrome.setSystemUIOverlayStyle] to be called
-  /// automatically.  Apps should not enclose an AppBar with their
+  /// automatically. Apps should not enclose an AppBar with their
   /// own [AnnotatedRegion].
   /// {@endtemplate}
   //

packages/flutter/lib/src/material/button_style.dart

@@ -74,7 +74,7 @@ import 'theme_data.dart';
 /// Configuring a ButtonStyle directly makes it possible to very
 /// precisely control the button’s visual attributes for all states.
 /// This level of control is typically required when a custom
-/// “branded” look and feel is desirable.  However, in many cases it’s
+/// “branded” look and feel is desirable. However, in many cases it’s
 /// useful to make relatively sweeping changes based on a few initial
 /// parameters with simple values. The button styleFrom() methods
 /// enable such sweeping changes. See for example:

packages/flutter/lib/src/material/chip.dart

@@ -2068,7 +2068,7 @@ class _RenderChip extends RenderBox with SlottedContainerRenderObjectMixin<_Chip
   }
 
   // Set this to true to have outlines of the tap targets drawn over
-  // the chip.  This should never be checked in while set to 'true'.
+  // the chip. This should never be checked in while set to 'true'.
   static const bool _debugShowTapTargetOutlines = false;
 
   @override

packages/flutter/lib/src/material/date_picker.dart

@@ -869,7 +869,7 @@ class _DatePickerHeader extends StatelessWidget {
 ///
 ///   * [helpText], the label displayed at the top of the dialog.
 ///   * [cancelText], the label on the cancel button for the text input mode.
-///   * [confirmText],the  label on the ok button for the text input mode.
+///   * [confirmText],the label on the ok button for the text input mode.
 ///   * [saveText], the label on the save button for the fullscreen calendar
 ///     mode.
 ///   * [errorFormatText], the message used when an input text isn't in a proper

packages/flutter/lib/src/material/dialog.dart

@@ -922,7 +922,7 @@ class SimpleDialog extends StatelessWidget {
   /// announce screen transitions when the dialog is opened and closed.
   ///
   /// If this label is not provided, a semantic label will be inferred from the
-  /// [title] if it is not null.  If there is no title, the label will be taken
+  /// [title] if it is not null. If there is no title, the label will be taken
   /// from [MaterialLocalizations.dialogLabel].
   ///
   /// See also:

packages/flutter/lib/src/material/elevated_button.dart

@@ -22,7 +22,7 @@ import 'theme_data.dart';
 /// A Material Design "elevated button".
 ///
 /// Use elevated buttons to add dimension to otherwise mostly flat
-/// layouts, e.g.  in long busy lists of content, or in wide
+/// layouts, e.g. in long busy lists of content, or in wide
 /// spaces. Avoid using elevated buttons on already-elevated content
 /// such as dialogs or cards.
 ///
@@ -33,7 +33,7 @@ import 'theme_data.dart';
 /// background is the [ButtonStyle.backgroundColor].
 ///
 /// The elevated button's default style is defined by
-/// [defaultStyleOf].  The style of this elevated button can be
+/// [defaultStyleOf]. The style of this elevated button can be
 /// overridden with its [style] parameter. The style of all elevated
 /// buttons in a subtree can be overridden with the
 /// [ElevatedButtonTheme], and the style of all of the elevated

packages/flutter/lib/src/material/elevated_button_theme.dart

@@ -16,7 +16,7 @@ import 'theme.dart';
 /// overall [Theme]'s [ThemeData.elevatedButtonTheme].
 ///
 /// The [style]'s properties override [ElevatedButton]'s default style,
-/// i.e.  the [ButtonStyle] returned by [ElevatedButton.defaultStyleOf]. Only
+/// i.e. the [ButtonStyle] returned by [ElevatedButton.defaultStyleOf]. Only
 /// the style's non-null property values or resolved non-null
 /// [MaterialStateProperty] values are used.
 ///

packages/flutter/lib/src/material/flexible_space_bar.dart

@@ -415,7 +415,7 @@ class FlexibleSpaceBarSettings extends InheritedWidget {
   ///
   /// This value is used by the [AppBar] to resolve
   /// [AppBar.backgroundColor] against [MaterialState.scrolledUnder],
-  /// i.e.  to enable apps to specify different colors when content
+  /// i.e. to enable apps to specify different colors when content
   /// has been scrolled up and behind the app bar.
   ///
   /// Null if the caller hasn't determined if the FlexibleSpaceBar

packages/flutter/lib/src/material/floating_action_button.dart

@@ -62,7 +62,7 @@ enum _FloatingActionButtonType {
 ///
 /// {@tool dartpad}
 /// This example shows how to make an extended [FloatingActionButton] in a
-/// [Scaffold], with a  pink [backgroundColor], a thumbs up [Icon] and a
+/// [Scaffold], with a pink [backgroundColor], a thumbs up [Icon] and a
 /// [Text] label that reads "Approve".
 ///
 /// ![](https://flutter.github.io/assets-for-api-docs/assets/material/floating_action_button_label.png)

packages/flutter/lib/src/material/ink_well.dart

@@ -501,7 +501,7 @@ class InkResponse extends StatelessWidget {
   /// [MaterialState.pressed] triggers a ripple (an ink splash), per
   /// the current Material Design spec. The [overlayColor] doesn't map
   /// a state to [highlightColor] because a separate highlight is not
-  /// used by the current design guidelines.  See
+  /// used by the current design guidelines. See
   /// https://material.io/design/interaction/states.html#pressed
   ///
   /// If the overlay color is null or resolves to null, then [focusColor],

packages/flutter/lib/src/material/input_decorator.dart

@@ -3124,7 +3124,7 @@ class InputDecoration {
   final String? counterText;
 
   /// Optional custom counter widget to go in the place otherwise occupied by
-  /// [counterText].  If this property is non null, then [counterText] is
+  /// [counterText]. If this property is non null, then [counterText] is
   /// ignored.
   final Widget? counter;
 
@@ -3317,7 +3317,7 @@ class InputDecoration {
   /// If [border] derives from [InputBorder] the border's [InputBorder.borderSide],
   /// i.e. the border's color and width, will be overridden to reflect the input
   /// decorator's state. Only the border's shape is used. If custom  [BorderSide]
-  /// values are desired for  a given state, all four borders – [errorBorder],
+  /// values are desired for a given state, all four borders – [errorBorder],
   /// [focusedBorder], [enabledBorder], [disabledBorder] – must be set.
   ///
   /// The decoration's container is the area which is filled if [filled] is

packages/flutter/lib/src/material/material_state.dart

@@ -604,8 +604,8 @@ class _MaterialStateUnderlineInputBorder extends MaterialStateUnderlineInputBord
 /// of [MaterialState]s.
 ///
 /// Material state properties represent values that depend on a widget's material
-/// "state".  The state is encoded as a set of [MaterialState] values, like
+/// "state". The state is encoded as a set of [MaterialState] values, like
-/// [MaterialState.focused], [MaterialState.hovered], [MaterialState.pressed].  For
+/// [MaterialState.focused], [MaterialState.hovered], [MaterialState.pressed]. For
 /// example the [InkWell.overlayColor] defines the color that fills the ink well
 /// when it's pressed (the "splash color"), focused, or hovered. The [InkWell]
 /// uses the overlay color's [resolve] method to compute the color for the
@@ -613,7 +613,7 @@ class _MaterialStateUnderlineInputBorder extends MaterialStateUnderlineInputBord
 ///
 /// [ButtonStyle], which is used to configure the appearance of
 /// buttons like [TextButton], [ElevatedButton], and [OutlinedButton],
-/// has many material state properties.  The button widgets keep track
+/// has many material state properties. The button widgets keep track
 /// of their current material state and [resolve] the button style's
 /// material state properties when their value is needed.
 ///

packages/flutter/lib/src/material/navigation_bar.dart

@@ -382,7 +382,7 @@ class _NavigationDestinationBuilder extends StatelessWidget {
   /// Builds the label for an destination in a [NavigationBar].
   ///
   /// To animate between unselected and selected, build the icon based on
-  /// [_NavigationDestinationInfo.selectedAnimation].  When the animation is
+  /// [_NavigationDestinationInfo.selectedAnimation]. When the animation is
   /// 0, the destination is unselected, when the animation is 1, the destination
   /// is selected.
   ///

packages/flutter/lib/src/material/outlined_button.dart

@@ -30,7 +30,7 @@ import 'theme_data.dart';
 /// elevation) [Material] widget. The label's [Text] and [Icon]
 /// widgets are displayed in the [style]'s
 /// [ButtonStyle.foregroundColor] and the outline's weight and color
-/// are defined by [ButtonStyle.side].  The button reacts to touches
+/// are defined by [ButtonStyle.side]. The button reacts to touches
 /// by filling with the [style]'s [ButtonStyle.overlayColor].
 ///
 /// The outlined button's default style is defined by [defaultStyleOf].
@@ -42,7 +42,7 @@ import 'theme_data.dart';
 ///
 /// Unlike [TextButton] or [ElevatedButton], outline buttons have a
 /// default [ButtonStyle.side] which defines the appearance of the
-/// outline.  Because the default `side` is non-null, it
+/// outline. Because the default `side` is non-null, it
 /// unconditionally overrides the shape's [OutlinedBorder.side]. In
 /// other words, to specify an outlined button's shape _and_ the
 /// appearance of its outline, both the [ButtonStyle.shape] and

packages/flutter/lib/src/material/outlined_button_theme.dart

@@ -16,7 +16,7 @@ import 'theme.dart';
 /// overall [Theme]'s [ThemeData.outlinedButtonTheme].
 ///
 /// The [style]'s properties override [OutlinedButton]'s default style,
-/// i.e.  the [ButtonStyle] returned by [OutlinedButton.defaultStyleOf]. Only
+/// i.e. the [ButtonStyle] returned by [OutlinedButton.defaultStyleOf]. Only
 /// the style's non-null property values or resolved non-null
 /// [MaterialStateProperty] values are used.
 ///

packages/flutter/lib/src/material/range_slider.dart

@@ -114,7 +114,7 @@ class RangeSlider extends StatefulWidget {
   /// the slider. To know when the value starts to change, or when it is done
   /// changing, set the optional callbacks [onChangeStart] and/or [onChangeEnd].
   ///
-  /// * [values], which  determines currently selected values for this range
+  /// * [values], which determines currently selected values for this range
   ///   slider.
   /// * [onChanged], which is called while the user is selecting a new value for
   ///   the range slider.
@@ -190,7 +190,7 @@ class RangeSlider extends StatefulWidget {
   ///
   /// See also:
   ///
-  ///  * [onChangeStart], which  is called when the user starts  changing the
+  ///  * [onChangeStart], which is called when the user starts changing the
   ///    values.
   ///  * [onChangeEnd], which is called when the user stops changing the values.
   final ValueChanged<RangeValues>? onChanged;

packages/flutter/lib/src/material/scaffold.dart

@@ -2484,7 +2484,7 @@ class ScaffoldState extends State<Scaffold> with TickerProviderStateMixin, Resto
   double get _floatingActionButtonVisibilityValue => _floatingActionButtonVisibilityController.value;
 
   /// Sets the current value of the visibility animation for the
-  /// [Scaffold.floatingActionButton].  This value must not be null.
+  /// [Scaffold.floatingActionButton]. This value must not be null.
   set _floatingActionButtonVisibilityValue(double newValue) {
     assert(newValue != null);
     _floatingActionButtonVisibilityController.value = clampDouble(newValue,
@@ -2522,7 +2522,7 @@ class ScaffoldState extends State<Scaffold> with TickerProviderStateMixin, Resto
   // iOS FEATURES - status bar tap, back gesture
 
   // On iOS, tapping the status bar scrolls the app's primary scrollable to the
-  // top. We implement this by looking up the  primary scroll controller and
+  // top. We implement this by looking up the primary scroll controller and
   // scrolling it to the top when tapped.
   void _handleStatusBarTap() {
     final ScrollController? primaryScrollController = PrimaryScrollController.of(context);

packages/flutter/lib/src/material/slider_theme.dart

@@ -1496,7 +1496,7 @@ mixin BaseSliderTrackShape {
   /// [Slider].
   ///
   /// The width is the width of the [Slider] or [RangeSlider], but padded by
-  /// the max  of the overlay and thumb radius. The height is defined by the
+  /// the max of the overlay and thumb radius. The height is defined by the
   /// [SliderThemeData.trackHeight].
   ///
   /// The [Rect] is centered both horizontally and vertically within the slider
@@ -1706,7 +1706,7 @@ class RoundedRectSliderTrackShape extends SliderTrackShape with BaseSliderTrackS
     assert(thumbCenter != null);
     // If the slider [SliderThemeData.trackHeight] is less than or equal to 0,
     // then it makes no difference whether the track is painted or not,
-    // therefore the painting  can be a no-op.
+    // therefore the painting can be a no-op.
     if (sliderTheme.trackHeight == null || sliderTheme.trackHeight! <= 0) {
       return;
     }
@@ -2331,7 +2331,7 @@ class _EmptySliderTickMarkShape extends SliderTickMarkShape {
 /// that will not paint any component shape. A static reference is stored in
 /// [SliderTickMarkShape.noThumb] and [SliderTickMarkShape.noOverlay]. When this value
 /// is specified for [SliderThemeData.thumbShape], the thumb painting is
-/// skipped.  When this value is specified for [SliderThemeData.overlayShape],
+/// skipped. When this value is specified for [SliderThemeData.overlayShape],
 /// the overlay painting is skipped.
 class _EmptySliderComponentShape extends SliderComponentShape {
   @override
@@ -3261,7 +3261,7 @@ class _PaddleSliderValueIndicatorPathPainter {
       0,
     );
 
-    // This is the needed extra width for the label.  It is only positive when
+    // This is the needed extra width for the label. It is only positive when
     // the label exceeds the minimum size contained by the round top lobe.
     final double halfWidthNeeded = math.max(
       0.0,

packages/flutter/lib/src/material/tabs.dart

@@ -98,7 +98,7 @@ class Tab extends StatelessWidget implements PreferredSizeWidget {
 
   /// The height of the [Tab].
   ///
-  /// If null, the height will be calculated based on the content of the [Tab].  When `icon` is not
+  /// If null, the height will be calculated based on the content of the [Tab]. When `icon` is not
   /// null along with `child` or `text`, the default height is 72.0 pixels. Without an `icon`, the
   /// height is 46.0 pixels.
   final double? height;

packages/flutter/lib/src/material/text_button_theme.dart

@@ -16,7 +16,7 @@ import 'theme.dart';
 /// overall [Theme]'s [ThemeData.textButtonTheme].
 ///
 /// The [style]'s properties override [TextButton]'s default style,
-/// i.e.  the [ButtonStyle] returned by [TextButton.defaultStyleOf]. Only
+/// i.e. the [ButtonStyle] returned by [TextButton.defaultStyleOf]. Only
 /// the style's non-null property values or resolved non-null
 /// [MaterialStateProperty] values are used.
 ///

packages/flutter/lib/src/material/text_field.dart

@@ -36,7 +36,7 @@ typedef InputCounterWidgetBuilder = Widget? Function(
   required int currentLength,
   /// The maximum string length that can be entered into the TextField.
   required int? maxLength,
-  /// Whether or not the TextField is currently focused.  Mainly provided for
+  /// Whether or not the TextField is currently focused. Mainly provided for
   /// the [liveRegion] parameter in the [Semantics] widget for accessibility.
   required bool isFocused,
 });
@@ -246,7 +246,7 @@ class TextField extends StatefulWidget {
   /// [maxLength] is set a character counter will be displayed below the
   /// field showing how many characters have been entered. If the value is
   /// set to a positive integer it will also display the maximum allowed
-  /// number of characters to be entered.  If the value is set to
+  /// number of characters to be entered. If the value is set to
   /// [TextField.noMaxLength] then only the current length is displayed.
   ///
   /// After [maxLength] characters have been input, additional input
@@ -444,7 +444,7 @@ class TextField extends StatefulWidget {
   ///
   /// On Android, the user can hide the keyboard - without changing the focus -
   /// with the system back button. They can restore the keyboard's visibility
-  /// by tapping on a text field.  The user might hide the keyboard and
+  /// by tapping on a text field. The user might hide the keyboard and
   /// switch to a physical keyboard, or they might just need to get it
   /// out of the way for a moment, to expose something it's
   /// obscuring. In this case requesting the focus again will not
@@ -733,7 +733,7 @@ class TextField extends StatefulWidget {
   /// Callback that generates a custom [InputDecoration.counter] widget.
   ///
   /// See [InputCounterWidgetBuilder] for an explanation of the passed in
-  /// arguments.  The returned widget will be placed below the line in place of
+  /// arguments. The returned widget will be placed below the line in place of
   /// the default widget built when [InputDecoration.counterText] is specified.
   ///
   /// The returned widget will be wrapped in a [Semantics] widget for

packages/flutter/lib/src/material/typography.dart

@@ -49,7 +49,7 @@ enum ScriptCategory {
 /// [MaterialLocalizations.scriptCategory] and is created
 /// by merging a color text theme - [black] for
 /// [Brightness.light] themes and [white] for [Brightness.dark]
-/// themes -  and a geometry text theme, one of [englishLike], [dense],
+/// themes - and a geometry text theme, one of [englishLike], [dense],
 /// or [tall], depending on the locale.
 ///
 /// To lookup the localized text theme use

packages/flutter/lib/src/painting/gradient.dart

@@ -579,7 +579,7 @@ class LinearGradient extends Gradient {
 /// which will make the rendered gradient appear to be pointed or directed in the
 /// direction of the [focal] point. This is only important if [focal] and [center]
 /// are not equal or [focalRadius] > 0.0 (as this case is visually identical to a
-/// normal radial gradient).  One important case to avoid is having [focal] and
+/// normal radial gradient). One important case to avoid is having [focal] and
 /// [center] both resolve to [Offset.zero] when [focalRadius] > 0.0. In such a case,
 /// a valid shader cannot be created by the framework.
 ///
@@ -687,7 +687,7 @@ class RadialGradient extends Gradient {
   /// ![](https://flutter.github.io/assets-for-api-docs/assets/dart-ui/tile_mode_repeated_radialWithFocal.png)
   final TileMode tileMode;
 
-  /// The focal point of the gradient.  If specified, the gradient will appear
+  /// The focal point of the gradient. If specified, the gradient will appear
   /// to be focused along the vector from [center] to focal.
   ///
   /// See [center] for a description of how the coordinates are mapped.

packages/flutter/lib/src/painting/inline_span.dart

@@ -68,7 +68,7 @@ class InlineSpanSemanticsInformation {
   /// The text info for a [PlaceholderSpan].
   static const InlineSpanSemanticsInformation placeholder = InlineSpanSemanticsInformation('\uFFFC', isPlaceholder: true);
 
-  /// The text value, if any.  For [PlaceholderSpan]s, this will be the unicode
+  /// The text value, if any. For [PlaceholderSpan]s, this will be the unicode
   /// placeholder value.
   final String text;
 
@@ -280,7 +280,7 @@ abstract class InlineSpan extends DiagnosticableTree {
   /// Walks the [InlineSpan] tree and accumulates a list of
   /// [InlineSpanSemanticsInformation] objects.
   ///
-  /// This method should not be directly called.  Use
+  /// This method should not be directly called. Use
   /// [getSemanticsInformation] instead.
   ///
   /// [PlaceholderSpan]s in the tree will be represented with a

packages/flutter/lib/src/painting/matrix_utils.dart

@@ -245,7 +245,7 @@ class MatrixUtils {
     // since we know that Z=0.0. We can also get rid of the 3rd row because
     // we ignore the resulting Z coordinate. Finally we can get rid of the
     // last row if we don't have a perspective transform since we can verify
-    // that the results are 1.0 for all points.  This gets us down to 16
+    // that the results are 1.0 for all points. This gets us down to 16
     // multiplies and 16 adds in the non-perspective case and 24 of each for
     // the perspective case. (Plus the 12 comparisons to turn them back into
     // a bounding box.)
@@ -282,7 +282,7 @@ class MatrixUtils {
     // continue to hold with respect to the non-normalized coordinates so
     // we can still save a lot of multiplications by computing the 4
     // non-normalized coordinates using relative additions before we normalize
-    // them and they lose their "pseudo-parallelogram" relationships.  We still
+    // them and they lose their "pseudo-parallelogram" relationships. We still
     // have to do the normalization divisions and min/max all 4 points to
     // get the resulting transformed bounding box, but we save a lot of
     // calculations over blindly transforming all 4 coordinates independently.
@@ -344,8 +344,8 @@ class MatrixUtils {
     // for a total of 8 multiplies, 8 adds, and 4 comparisons.
     //
     // An astute observer will note that we do need to do 2 subtractions at
-    // the top of the method to compute the width and height.  Add those to
+    // the top of the method to compute the width and height. Add those to
-    // all of the relative solutions listed above.  The test for perspective
+    // all of the relative solutions listed above. The test for perspective
     // also adds 3 compares to the affine case and up to 3 compares to the
     // perspective case (depending on which test fails, the rest are omitted).
     //

packages/flutter/lib/src/painting/text_style.dart

@@ -772,16 +772,16 @@ class TextStyle with Diagnosticable {
   /// A list of [FontFeature]s that affect how the font selects glyphs.
   ///
   /// Some fonts support multiple variants of how a given character can be
-  /// rendered.  For example, a font might provide both proportional and
+  /// rendered. For example, a font might provide both proportional and
   /// tabular numbers, or it might offer versions of the zero digit with
-  /// and without slashes.  [FontFeature]s can be used to select which of
+  /// and without slashes. [FontFeature]s can be used to select which of
   /// these variants will be used for rendering.
   final List<ui.FontFeature>? fontFeatures;
 
   /// A list of [FontVariation]s that affect how a variable font is rendered.
   ///
   /// Some fonts are variable fonts that can generate multiple font faces based
-  /// on the values of customizable attributes.  For example, a variable font
+  /// on the values of customizable attributes. For example, a variable font
   /// may have a weight axis that can be set to a value between 1 and 1000.
   /// [FontVariation]s can be used to select the values of these design axes.
   ///

packages/flutter/lib/src/rendering/mouse_tracker.dart

@@ -297,7 +297,7 @@ class MouseTracker extends ChangeNotifier {
   /// result.
   ///
   /// The [updateWithEvent] indicates that an event has been observed, and is
-  /// called during the handler of the event.  It is typically called by
+  /// called during the handler of the event. It is typically called by
   /// [RendererBinding], and should be called with all events received, and let
   /// [MouseTracker] filter which to react to.
   ///

packages/flutter/lib/src/rendering/platform_view.dart

@@ -732,7 +732,7 @@ mixin _PlatformViewGestureMixin on RenderBox implements MouseTrackerAnnotation {
 
   _HandlePointerEvent? _handlePointerEvent;
 
-  /// {@macro  flutter.rendering.RenderAndroidView.updateGestureRecognizers}
+  /// {@macro flutter.rendering.RenderAndroidView.updateGestureRecognizers}
   ///
   /// Any active gesture arena the `PlatformView` participates in is rejected when the
   /// set of gesture recognizers is changed.

packages/flutter/lib/src/services/hardware_keyboard.dart

@@ -353,7 +353,7 @@ typedef KeyEventCallback = bool Function(KeyEvent event);
 /// ## Compared to [RawKeyboard]
 ///
 /// [RawKeyboard] is the legacy API, and will be deprecated and removed in the
-/// future.  It is recommended to always use [HardwareKeyboard] and [KeyEvent]
+/// future. It is recommended to always use [HardwareKeyboard] and [KeyEvent]
 /// APIs (such as [FocusNode.onKeyEvent]) to handle key events.
 ///
 /// Behavior-wise, [RawKeyboard] provides a less unified, less regular
@@ -672,7 +672,7 @@ class KeyMessage {
   /// The list of [KeyEvent]s converted from the native key message.
   ///
   /// A native key message is converted into multiple [KeyEvent]s in a regular
-  /// event model.  The [events] might contain zero or any number of
+  /// event model. The [events] might contain zero or any number of
   /// [KeyEvent]s.
   ///
   /// See also:

packages/flutter/lib/src/services/raw_keyboard.dart

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'dart:io';
+
 import 'package:flutter/foundation.dart';
 
 import 'binding.dart';
@@ -88,7 +89,7 @@ enum ModifierKey {
 
   /// The SCROLL LOCK modifier key.
   ///
-  /// Typically, there is one of these.  Only shown as "pressed" when the scroll
+  /// Typically, there is one of these. Only shown as "pressed" when the scroll
   /// lock is on, so on a key up when the mode is turned on, on each key press
   /// when it's enabled, and on a key down when it is turned off.
   scrollLockModifier,
@@ -568,7 +569,7 @@ class RawKeyUpEvent extends RawKeyEvent {
 /// a handler that can determine if the key has been handled or not.
 ///
 /// The handler should return true if the key has been handled, and false if the
-/// key was not handled.  It must not return null.
+/// key was not handled. It must not return null.
 typedef RawKeyEventHandler = bool Function(RawKeyEvent event);
 
 /// An interface for listening to raw key events.

packages/flutter/lib/src/services/text_editing.dart

@@ -199,7 +199,7 @@ class TextSelection extends TextRange {
   /// ## Difference with [extendTo]
   /// In contrast with this method, [extendTo] is a pivot; it holds
   /// [TextSelection.baseOffset] fixed while moving [TextSelection.extentOffset]
-  /// to the given [TextPosition].  It doesn't strictly grow the selection and
+  /// to the given [TextPosition]. It doesn't strictly grow the selection and
   /// may collapse it or flip its order.
   TextSelection expandTo(TextPosition position, [bool extentAtIndex = false]) {
     // If position is already within in the selection, there's nothing to do.

packages/flutter/lib/src/widgets/app.dart

@@ -278,7 +278,7 @@ class WidgetsApp extends StatefulWidget {
   /// ```
   ///
   /// It is possible to specify both [home] and [routes], but only if [routes] does
-  ///  _not_ contain an entry for `'/'`.  Conversely, if [home] is omitted, [routes]
+  ///  _not_ contain an entry for `'/'`. Conversely, if [home] is omitted, [routes]
   /// _must_ contain an entry for `'/'`.
   ///
   /// If [home] or [routes] are not null, the routing implementation needs to know how
@@ -295,7 +295,7 @@ class WidgetsApp extends StatefulWidget {
   /// [onGenerateRoute] and [onUnknownRoute] parameters. These parameters correspond
   /// to [Navigator.onGenerateRoute] and [Navigator.onUnknownRoute]. If [home], [routes],
   /// and [builder] are null, or if they fail to create a requested route,
-  /// [onGenerateRoute] will be invoked.  If that fails, [onUnknownRoute] will be invoked.
+  /// [onGenerateRoute] will be invoked. If that fails, [onUnknownRoute] will be invoked.
   ///
   /// The [pageRouteBuilder] is called to create a [PageRoute] that wraps newly built routes.
   /// If the [builder] is non-null and the [onGenerateRoute] argument is null, then the

packages/flutter/lib/src/widgets/basic.dart

@@ -82,7 +82,7 @@ export 'package:flutter/services.dart' show
 // BIDIRECTIONAL TEXT SUPPORT
 
 /// An [InheritedElement] that has hundreds of dependencies but will
-/// infrequently change.  This provides a performance tradeoff where building
+/// infrequently change. This provides a performance tradeoff where building
 /// the [Widget]s is faster but performing updates is slower.
 ///
 /// |                     | _UbiquitiousInheritedElement | InheritedElement |
@@ -101,7 +101,7 @@ class _UbiquitousInheritedElement extends InheritedElement {
   @override
   void setDependencies(Element dependent, Object? value) {
     // This is where the cost of [InheritedElement] is incurred during build
-    // time of the widget tree.  Omitting this bookkeeping is where the
+    // time of the widget tree. Omitting this bookkeeping is where the
     // performance savings come from.
     assert(value == null);
   }
@@ -3411,7 +3411,7 @@ class IntrinsicWidth extends SingleChildRenderObjectWidget {
   /// See also:
   ///
   ///  * [RenderBox.getMaxIntrinsicWidth], which defines a widget's max
-  ///    intrinsic width  in general.
+  ///    intrinsic width in general.
   final double? stepWidth;
 
   /// If non-null, force the child's height to be a multiple of this value.

packages/flutter/lib/src/widgets/drag_target.dart

@@ -311,7 +311,7 @@ class Draggable<T extends Object> extends StatefulWidget {
   /// the semantics tree.
   ///
   /// This value should be set to false when the [feedback] widget is intended
-  /// to be the same object as the [child].  Placing a [GlobalKey] on this
+  /// to be the same object as the [child]. Placing a [GlobalKey] on this
   /// widget will ensure semantic focus is kept on the element as it moves in
   /// and out of the feedback position.
   ///

packages/flutter/lib/src/widgets/draggable_scrollable_sheet.dart

@@ -424,8 +424,8 @@ class DraggableScrollableNotification extends Notification with ViewportNotifica
   /// Creates a notification that the extent of a [DraggableScrollableSheet] has
   /// changed.
   ///
-  /// All parameters are required. The [minExtent] must be >= 0.  The [maxExtent]
+  /// All parameters are required. The [minExtent] must be >= 0. The [maxExtent]
-  /// must be <= 1.0.  The [extent] must be between [minExtent] and [maxExtent].
+  /// must be <= 1.0. The [extent] must be between [minExtent] and [maxExtent].
   DraggableScrollableNotification({
     required this.extent,
     required this.minExtent,

packages/flutter/lib/src/widgets/editable_text.dart

@@ -478,12 +478,12 @@ class _DiscreteKeyFrameSimulation extends Simulation {
 ///
 /// | **Intent Class**                                                                     | **Default Behavior when there's selected text**                  | **Default Behavior when there is a caret ([TextSelection.collapsed])**  |
 /// | :----------------------------------------------------------------------------------- | :--------------------------------------------------------------- | :---------------------------------------------------------------------- |
-/// | [ExtendSelectionByCharacterIntent](`collapseSelection: true`)                       | Collapses the selection to the logical start/end of the selection | Moves the caret past the user-perceived character before or after the current caret location.  |
+/// | [ExtendSelectionByCharacterIntent](`collapseSelection: true`)                        | Collapses the selection to the logical start/end of the selection | Moves the caret past the user-perceived character before or after the current caret location. |
-/// | [ExtendSelectionToNextWordBoundaryIntent](`collapseSelection: true`)                | Collapses the selection to the word boundary before/after the selection's [TextSelection.extent] position | Moves the caret to the previous/next word boundary.  |
+/// | [ExtendSelectionToNextWordBoundaryIntent](`collapseSelection: true`)                 | Collapses the selection to the word boundary before/after the selection's [TextSelection.extent] position | Moves the caret to the previous/next word boundary. |
-/// | [ExtendSelectionToNextWordBoundaryOrCaretLocationIntent](`collapseSelection: true`) | Collapses the selection to the word boundary before/after the selection's [TextSelection.extent] position, or [TextSelection.base], whichever is closest in the given direction | Moves the caret to the previous/next word boundary.  |
+/// | [ExtendSelectionToNextWordBoundaryOrCaretLocationIntent](`collapseSelection: true`)  | Collapses the selection to the word boundary before/after the selection's [TextSelection.extent] position, or [TextSelection.base], whichever is closest in the given direction | Moves the caret to the previous/next word boundary. |
-/// | [ExtendSelectionToLineBreakIntent](`collapseSelection: true`)                       | Collapses the selection to the start/end of the line at the selection's [TextSelection.extent] position | Moves the caret to the start/end of the current line .|
+/// | [ExtendSelectionToLineBreakIntent](`collapseSelection: true`)                        | Collapses the selection to the start/end of the line at the selection's [TextSelection.extent] position | Moves the caret to the start/end of the current line .|
-/// | [ExtendSelectionVerticallyToAdjacentLineIntent](`collapseSelection: true`)          | Collapses the selection to the position closest to the selection's [TextSelection.extent], on the previous/next adjacent line | Moves the caret to the closest position on the previous/next adjacent line. |
+/// | [ExtendSelectionVerticallyToAdjacentLineIntent](`collapseSelection: true`)           | Collapses the selection to the position closest to the selection's [TextSelection.extent], on the previous/next adjacent line | Moves the caret to the closest position on the previous/next adjacent line. |
-/// | [ExtendSelectionToDocumentBoundaryIntent](`collapseSelection: true`)                | Collapses the selection to the start/end of the document | Moves the caret to the start/end of the document. |
+/// | [ExtendSelectionToDocumentBoundaryIntent](`collapseSelection: true`)                 | Collapses the selection to the start/end of the document | Moves the caret to the start/end of the document. |
 ///
 /// #### Intents for Extending the Selection
 ///

packages/flutter/lib/src/widgets/focus_manager.dart

@@ -452,7 +452,7 @@ class FocusNode with DiagnosticableTreeMixin, ChangeNotifier {
 
   /// If true, this focus node may request the primary focus.
   ///
-  /// Defaults to true.  Set to false if you want this node to do nothing when
+  /// Defaults to true. Set to false if you want this node to do nothing when
   /// [requestFocus] is called on it.
   ///
   /// If set to false on a [FocusScopeNode], will cause all of the children of
@@ -1694,7 +1694,7 @@ class FocusManager with DiagnosticableTreeMixin, ChangeNotifier {
           handled = false;
           break;
       }
-      // Only KeyEventResult.ignored will continue the for loop.  All other
+      // Only KeyEventResult.ignored will continue the for loop. All other
       // options will stop the event propagation.
       assert(result != KeyEventResult.ignored);
       break;

packages/flutter/lib/src/widgets/focus_scope.dart

@@ -234,7 +234,7 @@ class Focus extends StatefulWidget {
   /// {@template flutter.widgets.Focus.canRequestFocus}
   /// If true, this widget may request the primary focus.
   ///
-  /// Defaults to true.  Set to false if you want the [FocusNode] this widget
+  /// Defaults to true. Set to false if you want the [FocusNode] this widget
   /// manages to do nothing when [FocusNode.requestFocus] is called on it. Does
   /// not affect the children of this node, and [FocusNode.hasFocus] can still
   /// return true if this node is the ancestor of the primary focus.

packages/flutter/lib/src/widgets/focus_traversal.dart

@@ -1347,7 +1347,7 @@ class OrderedTraversalPolicy extends FocusTraversalPolicy with DirectionalFocusT
         a.order.runtimeType == b.order.runtimeType,
         'When sorting nodes for determining focus order, the order (${a.order}) of '
         "node ${a.node}, isn't the same type as the order (${b.order}) of ${b.node}. "
-        "Incompatible order types can't be compared.  Use a FocusTraversalGroup to group "
+        "Incompatible order types can't be compared. Use a FocusTraversalGroup to group "
         'similar orders together.',
       );
       return a.order.compareTo(b.order);
@@ -1442,7 +1442,7 @@ class FocusTraversalOrder extends InheritedWidget {
 /// {@tool dartpad}
 /// This sample shows three rows of buttons, each grouped by a
 /// [FocusTraversalGroup], each with different traversal order policies. Use tab
-/// traversal to see the order they are traversed in.  The first row follows a
+/// traversal to see the order they are traversed in. The first row follows a
 /// numerical order, the second follows a lexical order (ordered to traverse
 /// right to left), and the third ignores the numerical order assigned to it and
 /// traverses in widget order.

packages/flutter/lib/src/widgets/keyboard_listener.dart

@@ -32,7 +32,7 @@ export 'package:flutter/services.dart' show KeyEvent;
 ///  * [RawKeyboardListener], a similar widget based on the old [RawKeyboard]
 ///    API.
 class KeyboardListener extends StatelessWidget {
-  /// Creates a widget that receives  keyboard events.
+  /// Creates a widget that receives keyboard events.
   ///
   /// For text entry, consider using a [EditableText], which integrates with
   /// on-screen keyboards and input method editors (IMEs).

packages/flutter/lib/src/widgets/navigator.dart

@@ -624,12 +624,12 @@ class NavigatorObserver {
   NavigatorState? get navigator => _navigators[this];
 
   /// Expando mapping instances of NavigatorObserver to their associated
-  /// NavigatorState (or `null`, if there is no associated NavigatorState).  The
+  /// NavigatorState (or `null`, if there is no associated NavigatorState). The
   /// reason we don't simply use a private instance field of type
   /// `NavigatorState?` is because as part of implementing
   /// https://github.com/dart-lang/language/issues/2020, it will soon become a
   /// runtime error to invoke a private member that is mocked in another
-  /// library.  By using an expando rather than an instance field, we ensure
+  /// library. By using an expando rather than an instance field, we ensure
   /// that a mocked NavigatorObserver can still properly keep track of its
   /// associated NavigatorState.
   static final Expando<NavigatorState> _navigators = Expando<NavigatorState>();

packages/flutter/lib/src/widgets/overflow_bar.dart

@@ -33,7 +33,7 @@ enum OverflowBarAlignment {
 ///
 /// This widget's width will expand to contain its children and the
 /// specified [spacing] until it overflows. The overflow column will
-/// consume all of the available width.  The [overflowAlignment]
+/// consume all of the available width. The [overflowAlignment]
 /// defines how each child will be aligned within the overflow column
 /// and the [overflowSpacing] defines the gap between each child.
 ///

packages/flutter/lib/src/widgets/router.dart

@@ -1060,7 +1060,7 @@ class ChildBackButtonDispatcher extends BackButtonDispatcher {
   final BackButtonDispatcher parent;
 
   /// The parent of this child back button dispatcher decide to let this
-  /// child to handle the invoke the  callback request in
+  /// child to handle the invoke the callback request in
   /// [BackButtonDispatcher.invokeCallback].
   ///
   /// Return a boolean future with true if this child will handle the request;

packages/flutter/lib/src/widgets/routes.dart

@@ -419,7 +419,7 @@ abstract class TransitionRoute<T> extends OverlayRoute<T> {
   ///
   /// If true, and `nextRoute.canTransitionFrom()` is true, then the
   /// [ModalRoute.buildTransitions] `secondaryAnimation` will run from 0.0 - 1.0
-  /// when [nextRoute] is pushed on top of this one.  Similarly, if
+  /// when [nextRoute] is pushed on top of this one. Similarly, if
   /// the [nextRoute] is popped off of this route, the
   /// `secondaryAnimation` will run from 1.0 - 0.0.
   ///

packages/flutter/lib/src/widgets/scroll_activity.dart

@@ -48,7 +48,7 @@ abstract class ScrollActivityDelegate {
   /// given velocity.
   void goBallistic(double velocity);
 
-  /// Update the ballistic animation instead of restarting  it, for example as
+  /// Update the ballistic animation instead of restarting it, for example as
   /// the result of a layout change after a flinging gesture.
   ///
   /// The [initVelocity] and [initPosition] refer to the starting values of the

packages/flutter/lib/src/widgets/scroll_aware_image_provider.dart

@@ -102,7 +102,7 @@ class ScrollAwareImageProvider<T extends Object> extends ImageProvider<T> {
       return;
     }
     // We are in the tree, we're not scrolling too fast, the cache doesn't
-    // have our image, and no one has otherwise completed the stream.  Go.
+    // have our image, and no one has otherwise completed the stream. Go.
     imageProvider.resolveStreamForKey(configuration, stream, key, handleError);
   }
 

packages/flutter/lib/src/widgets/scrollbar.dart

@@ -863,7 +863,7 @@ class ScrollbarPainter extends ChangeNotifier implements CustomPainter {
 /// If the child [ScrollView] is infinitely long, the [RawScrollbar] will not be
 /// painted. In this case, the scrollbar cannot accurately represent the
 /// relative location of the visible area, or calculate the accurate delta to
-/// apply when  dragging on the thumb or tapping on the track.
+/// apply when dragging on the thumb or tapping on the track.
 ///
 /// ### Interaction
 ///
@@ -1134,7 +1134,7 @@ class RawScrollbar extends StatefulWidget {
   ///            controller: controllerOne,
   ///            itemCount: 120,
   ///            itemBuilder: (BuildContext context, int index) {
-  ///              return  Text('item $index');
+  ///              return Text('item $index');
   ///            },
   ///          ),
   ///        ),
@@ -1219,7 +1219,7 @@ class RawScrollbar extends StatefulWidget {
   ///            controller: controllerOne,
   ///            itemCount: 120,
   ///            itemBuilder: (BuildContext context, int index) {
-  ///              return  Text('item $index');
+  ///              return Text('item $index');
   ///            },
   ///          ),
   ///        ),

packages/flutter/lib/src/widgets/shortcuts.dart

@@ -65,7 +65,7 @@ class KeySet<T extends KeyboardKey> {
     assert(_keys.length == count, 'Two or more provided keys are identical. Each key must appear only once.');
   }
 
-  /// Create  a [KeySet] from a set of [KeyboardKey]s.
+  /// Create a [KeySet] from a set of [KeyboardKey]s.
   ///
   /// Do not mutate the `keys` set after passing it to this object.
   ///
@@ -272,7 +272,7 @@ class LogicalKeySet extends KeySet<LogicalKeyboardKey> with Diagnosticable
     super.key4,
   ]);
 
-  /// Create  a [LogicalKeySet] from a set of [LogicalKeyboardKey]s.
+  /// Create a [LogicalKeySet] from a set of [LogicalKeyboardKey]s.
   ///
   /// Do not mutate the `keys` set after passing it to this object.
   LogicalKeySet.fromSet(super.keys) : super.fromSet();

packages/flutter/lib/src/widgets/snapshot_widget.dart

@@ -318,7 +318,7 @@ class _RenderSnapshotWidget extends RenderProxyBox {
 /// would be a snapshot.
 ///
 /// The painter can call [notifyListeners] to have the [SnapshotWidget]
-/// re-paint (re-using the same raster). This allows animations to be  performed
+/// re-paint (re-using the same raster). This allows animations to be performed
 /// without re-snapshotting of children. For certain scale or perspective changing
 /// transforms, such as a rotation, this can be significantly faster than performing
 /// the same animation at the widget level.

packages/flutter/lib/src/widgets/text_editing_intents.dart

@@ -99,7 +99,7 @@ abstract class DirectionalCaretMovementIntent extends DirectionalTextEditingInte
   ///
   /// If true, when an [Intent] to go to the beginning/end of a wordwrapped line
   /// is received and the selection is already at the beginning/end of the line,
-  /// then the selection will be moved to the next/previous line.  If false, the
+  /// then the selection will be moved to the next/previous line. If false, the
   /// selection will remain at the wordwrap.
   final bool continuesAtWrap;
 }

packages/flutter/lib/src/widgets/widget_inspector.dart

@@ -34,7 +34,7 @@ import 'gesture_detector.dart';
 /// [WidgetInspector.selectButtonBuilder].
 typedef InspectorSelectButtonBuilder = Widget Function(BuildContext context, VoidCallback onPressed);
 
-/// Signature for a  method that registers the service extension `callback` with
+/// Signature for a method that registers the service extension `callback` with
 /// the given `name`.
 ///
 /// Used as argument to [WidgetInspectorService.initServiceExtensions]. The

packages/flutter/test/material/dialog_test.dart

@@ -48,7 +48,7 @@ RenderParagraph _getTextRenderObjectFromDialog(WidgetTester tester, String text)
 
 // What was the AlertDialog's ButtonBar when many of these tests were written,
 // is now a Padding widget with an OverflowBar child. The Padding widget's size
-// and location  match the original ButtonBar's size and location.
+// and location match the original ButtonBar's size and location.
 Finder _findButtonBar() {
   return find.ancestor(of: find.byType(OverflowBar), matching: find.byType(Padding)).first;
 }

packages/flutter/test/material/input_decorator_test.dart

@@ -2135,7 +2135,7 @@ void main() {
       ),
     );
 
-    // Overall height for this InputDecorator is 100dps because the prefix icon's  size
+    // Overall height for this InputDecorator is 100dps because the prefix icon's size
     // is 100x100 and the rest of the elements only require 40dps:
      //   12 - top padding
      //   16 - input text (ahem font size 16dps)

packages/flutter/test/material/navigation_rail_test.dart

@@ -1143,7 +1143,7 @@ void main() {
     );
 
     // Since the rail is icon only, its preferred width should not be affected
-    // by  textScaleFactor.
+    // by textScaleFactor.
     final RenderBox renderBox = tester.renderObject(find.byType(NavigationRail));
     expect(renderBox.size.width, compactWidth);
 
@@ -1221,7 +1221,7 @@ void main() {
     );
 
     // Since the rail is icon only, its preferred width should not be affected
-    // by  textScaleFactor.
+    // by textScaleFactor.
     final RenderBox renderBox = tester.renderObject(find.byType(NavigationRail));
     expect(renderBox.size.width, compactWidth);
 
@@ -3603,7 +3603,7 @@ void main() {
       );
 
       // Since the rail is icon only, its preferred width should not be affected
-      // by  textScaleFactor.
+      // by textScaleFactor.
       final RenderBox renderBox = tester.renderObject(find.byType(NavigationRail));
       expect(renderBox.size.width, 56.0);
 
@@ -3674,7 +3674,7 @@ void main() {
       );
 
       // Since the rail is icon only, its preferred width should not be affected
-      // by  textScaleFactor.
+      // by textScaleFactor.
       final RenderBox renderBox = tester.renderObject(find.byType(NavigationRail));
       expect(renderBox.size.width, 56.0);
 

packages/flutter/test/material/scaffold_test.dart

@@ -2062,7 +2062,7 @@ void main() {
     await tester.pumpWidget(buildFrame(false, false));
     expect(tester.getSize(find.byKey(bodyKey)), const Size(800.0, 600.0));
 
-    await tester.pumpWidget(buildFrame(null, null));  // resizeToAvoidBottomInset default  is true
+    await tester.pumpWidget(buildFrame(null, null));  // resizeToAvoidBottomInset default is true
     expect(tester.getSize(find.byKey(bodyKey)), const Size(800.0, 500.0));
 
     await tester.pumpWidget(buildFrame(null, false));

packages/flutter/test/widgets/navigator_test.dart

@@ -840,7 +840,7 @@ void main() {
   });
 
   testWidgets('pushReplacement correctly reports didReplace to the observer', (WidgetTester tester) async {
-    // Regression test for  https://github.com/flutter/flutter/issues/56892.
+    // Regression test for https://github.com/flutter/flutter/issues/56892.
     final Map<String, WidgetBuilder> routes = <String, WidgetBuilder>{
       '/' : (BuildContext context) => const OnTapPage(
         id: '/',

packages/flutter/test/widgets/nested_scroll_view_test.dart

@@ -2216,7 +2216,7 @@ void main() {
       await tester.drag(find.text('Item 49'), const Offset(0.0, -50.0));
       await tester.pump();
       // If handled correctly, the last item should still be visible and
-      // progressing  back down to the bottom edge, instead of jumping further
+      // progressing back down to the bottom edge, instead of jumping further
       // up the list and out of view.
       expect(find.text('Item 49'), findsOneWidget);
       await tester.pumpAndSettle();

packages/flutter_test/lib/src/animation_sheet.dart

@@ -102,7 +102,7 @@ class AnimationSheetBuilder {
   /// subtree of [record].
   ///
   /// If [allLayers] is false, then the [record] widget will capture the image
-  /// composited by its subtree.  If [allLayers] is true, then the [record] will
+  /// composited by its subtree. If [allLayers] is true, then the [record] will
   /// capture the entire tree composited and clipped by [record]'s region.
   ///
   /// The two modes are identical if there is nothing in front of [record].

packages/flutter_test/lib/src/event_simulation.dart

@@ -722,7 +722,7 @@ class KeyEventSimulator {
   // its values.
   //
   // The `_transitMode` defaults to [KeyDataTransitMode.rawKeyEvent], and can be
-  // overridden with [debugKeyEventSimulatorTransitModeOverride].  In widget tests, it
+  // overridden with [debugKeyEventSimulatorTransitModeOverride]. In widget tests, it
   // is often set with [KeySimulationModeVariant].
   static KeyDataTransitMode get _transitMode {
     KeyDataTransitMode? result;

packages/flutter_test/lib/src/matchers.dart

@@ -500,7 +500,7 @@ AsyncMatcher matchesReferenceImage(ui.Image image) {
 /// Asserts that a [SemanticsNode] contains the specified information.
 ///
 /// If either the label, hint, value, textDirection, or rect fields are not
-/// provided, then they are not part of the comparison.  All of the boolean
+/// provided, then they are not part of the comparison. All of the boolean
 /// flag and action fields must match, and default to false.
 ///
 /// To retrieve the semantics data of a widget, use [WidgetTester.getSemantics]

packages/flutter_tools/lib/runner.dart

@@ -62,12 +62,12 @@ Future<int> run(
         await runner.run(args);
 
         // Triggering [runZoned]'s error callback does not necessarily mean that
-        // we stopped executing the body.  See https://github.com/dart-lang/sdk/issues/42150.
+        // we stopped executing the body. See https://github.com/dart-lang/sdk/issues/42150.
         if (firstError == null) {
           return await _exit(0);
         }
 
-        // We already hit some error, so don't return success.  The error path
+        // We already hit some error, so don't return success. The error path
         // (which should be in progress) is responsible for calling _exit().
         return 1;
       } catch (error, stackTrace) { // ignore: avoid_catches_without_on_clauses

packages/flutter_tools/lib/src/android/android_device.dart

@@ -20,7 +20,6 @@ import '../device.dart';
 import '../device_port_forwarder.dart';
 import '../project.dart';
 import '../protocol_discovery.dart';
-
 import 'android.dart';
 import 'android_builder.dart';
 import 'android_console.dart';
@@ -313,7 +312,7 @@ class AndroidDevice extends Device {
     try {
       // If the server is automatically restarted, then we get irrelevant
       // output lines like this, which we want to ignore:
-      //   adb server is out of date.  killing..
+      //   adb server is out of date. killing..
       //   * daemon started successfully *
       await _processUtils.run(
         <String>[adbPath, 'start-server'],

packages/flutter_tools/lib/src/asset.dart

@@ -270,7 +270,7 @@ class ManifestAssetBundle implements AssetBundle {
       return 1;
     }
 
-    // Parse assets for  deferred components.
+    // Parse assets for deferred components.
     final Map<String, Map<_Asset, List<_Asset>>> deferredComponentsAssetVariants = _parseDeferredComponentsAssets(
       flutterManifest,
       packageConfig,

packages/flutter_tools/lib/src/base/logger.dart

@@ -1198,7 +1198,7 @@ class SilentStatus extends Status {
 
 const int _kTimePadding = 8; // should fit "99,999ms"
 
-/// Constructor writes [message] to [stdout].  On [cancel] or [stop], will call
+/// Constructor writes [message] to [stdout]. On [cancel] or [stop], will call
 /// [onFinish]. On [stop], will additionally print out summary information.
 class SummaryStatus extends Status {
   SummaryStatus({

packages/flutter_tools/lib/src/base/user_messages.dart

@@ -115,8 +115,8 @@ class UserMessages {
       'You can download the JDK from https://www.oracle.com/technetwork/java/javase/downloads/.';
   String androidJdkLocation(String location) => 'Java binary at: $location';
   String get androidLicensesAll => 'All Android licenses accepted.';
-  String get androidLicensesSome => 'Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses';
+  String get androidLicensesSome => 'Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses';
-  String get androidLicensesNone => 'Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses';
+  String get androidLicensesNone => 'Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses';
   String androidLicensesUnknown(Platform platform) =>
       'Android license status unknown.\n'
       'Run `flutter doctor --android-licenses` to accept the SDK licenses.\n'

packages/flutter_tools/lib/src/build_system/file_store.dart

@@ -84,7 +84,7 @@ enum FileStoreStrategy {
 /// through this class.
 ///
 /// This class uses either timestamps or file hashes depending on the
-/// provided [FileStoreStrategy]. All information  is held in memory during
+/// provided [FileStoreStrategy]. All information is held in memory during
 /// a build operation, and may be persisted to cache in the root build
 /// directory.
 ///

packages/flutter_tools/lib/src/bundle_builder.dart

@@ -166,7 +166,7 @@ Future<void> writeBundle(
       try {
         // This will result in strange looking files, for example files with `/`
         // on Windows or files that end up getting URI encoded such as `#.ext`
-        // to `%23.ext`.  However, we have to keep it this way since the
+        // to `%23.ext`. However, we have to keep it this way since the
         // platform channels in the framework will URI encode these values,
         // and the native APIs will look for files this way.
         final File file = globals.fs.file(globals.fs.path.join(bundleDir.path, entry.key));

packages/flutter_tools/lib/src/commands/create.dart

@@ -644,7 +644,7 @@ Your $application code is in $relativeAppMain.
   }
 
   // Takes an application template and replaces the main.dart with one from the
-  // documentation website in sampleCode.  Returns the difference in the number
+  // documentation website in sampleCode. Returns the difference in the number
   // of files after applying the sample, since it also deletes the application's
   // test directory (since the template's test doesn't apply to the sample).
   int _applySample(Directory directory, String sampleCode) {

packages/flutter_tools/lib/src/ios/devices.dart

@@ -704,7 +704,7 @@ class IOSDeviceLogReader extends DeviceLogReader {
 
     void logMessage(vm_service.Event event) {
       if (_iosDeployDebugger != null && _iosDeployDebugger!.debuggerAttached) {
-        // Prefer the more complete logs from the  attached debugger.
+        // Prefer the more complete logs from the attached debugger.
         return;
       }
       final String message = processVmServiceMessage(event);

packages/flutter_tools/lib/src/mdns_discovery.dart

@@ -41,7 +41,7 @@ class MDnsObservatoryDiscovery {
   /// Executes an mDNS query for a Dart Observatory.
   ///
   /// The [applicationId] parameter may be used to specify which application
-  /// to find.  For Android, it refers to the package name; on iOS, it refers to
+  /// to find. For Android, it refers to the package name; on iOS, it refers to
   /// the bundle ID.
   ///
   /// If it is not null, this method will find the port and authentication code

packages/flutter_tools/lib/src/runner/local_engine.dart

@@ -18,7 +18,7 @@ import '../dart/package_map.dart';
 /// The flutter tool can be run with the output files of one or more engine builds
 /// replacing the cached artifacts. Typically this is done by setting the
 /// `--local-engine` command line flag to the name of the desired engine variant
-/// (e.g. "host_debug_unopt").  Provided that the `flutter/` and `engine/` directories
+/// (e.g. "host_debug_unopt"). Provided that the `flutter/` and `engine/` directories
 /// are located adjacent to one another, the output folder will be located
 /// automatically.
 ///

packages/flutter_tools/lib/src/version.dart

@@ -327,7 +327,7 @@ class FlutterVersion {
   }
 
   /// log.showSignature=false is a user setting and it will break things,
-  /// so we want to disable it for every git log call.  This is a convenience
+  /// so we want to disable it for every git log call. This is a convenience
   /// wrapper that does that.
   @visibleForTesting
   static List<String> gitLog(List<String> args) {

packages/flutter_tools/test/general.shard/runner/runner_test.dart

@@ -34,7 +34,7 @@ void main() {
       // Instead of exiting with dart:io exit(), this causes an exception to
       // be thrown, which we catch with the onError callback in the zone below.
       //
-      // Tests might trigger exit() multiple times.  In real life, exit() would
+      // Tests might trigger exit() multiple times. In real life, exit() would
       // cause the VM to terminate immediately, so only the first one matters.
       firstExitCode = null;
       io.setExitFunctionForTests((int exitCode) {
@@ -102,7 +102,7 @@ void main() {
 
     // This Completer completes when CrashingFlutterCommand.runCommand
     // completes, but ideally we'd want it to complete when execution resumes
-    // runner.run.  Currently the distinction does not matter, but if it ever
+    // runner.run. Currently the distinction does not matter, but if it ever
     // does, this test might fail to catch a regression of
     // https://github.com/flutter/flutter/issues/56406.
     final Completer<void> commandCompleter = Completer<void>();
@@ -338,7 +338,7 @@ class CustomBugInstructions extends UserMessages {
 /// A fake [CrashReporter] that waits for a [Future] to complete.
 ///
 /// Used to exacerbate a race between the success and failure paths of
-/// [runner.run].  See https://github.com/flutter/flutter/issues/56406.
+/// [runner.run]. See https://github.com/flutter/flutter/issues/56406.
 class WaitingCrashReporter implements CrashReporter {
   WaitingCrashReporter(Future<void> future) : _future = future;
 

packages/flutter_tools/test/src/context.dart

@@ -154,7 +154,7 @@ void testUsingContext(
       );
     }, overrides: <Type, Generator>{
       // This has to go here so that runInContext will pick it up when it tries
-      // to do bot detection before running the closure.  This is important
+      // to do bot detection before running the closure. This is important
       // because the test may be giving us a fake HttpClientFactory, which may
       // throw in unexpected/abnormal ways.
       // If a test needs a BotDetector that does not always return true, it

packages/fuchsia_remote_debug_protocol/lib/src/fuchsia_remote_connection.dart

@@ -424,7 +424,7 @@ class FuchsiaRemoteConnection {
   }) async {
     if (!_dartVmCache.containsKey(uri)) {
       // When raising an HttpException this means that there is no instance of
-      // the Dart VM to communicate with.  The TimeoutException is raised when
+      // the Dart VM to communicate with. The TimeoutException is raised when
       // the Dart VM instance is shut down in the middle of communicating.
       try {
         final DartVm dartVm = await DartVm.connect(uri, timeout: timeout);