* Add tests for sorting arbPathString, supportedLocales and supportedLanguageCodes alphabetically
* Plural arbPathStrings
* Factor out singleZhMessageArbFileString
* Make translations more accurate and generic
* Add tests to gen_l10n.dart tool
* Separate out LocalizationsGenerator class to improve testability of code
* Add testing dependencies to dev/tools
* Integrate dev/tools testing to flutter CI
* Restructure dev/tools folder for testing
* Fix license headers
* Update project.pbxproj files to say Flutter rather than Chromium
Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.
* Update the copyright notice checker to require a standard notice on all files
* Update copyrights on Dart files. (This was a mechanical commit.)
* Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.
Some were already marked "The Flutter Authors", not clear why. Their
dates have been normalized. Some were missing the blank line after the
license. Some were randomly different in trivial ways for no apparent
reason (e.g. missing the trailing period).
* Clean up the copyrights in non-Dart files. (Manual edits.)
Also, make sure templates don't have copyrights.
* Fix some more ORGANIZATIONNAMEs
* Add check for placeholders being an empty map
* Remove unnecessary properties from en_ES.arb in the stocks example
* Use getter instead of methods in the stocks example
* Fixed "annotating types for function expression parameters" lint issue from generated localizations delegate code
*Starting with arb files in lib/l10n, the tool creates the following by default:
1. An AppLocalizations class containing:
- an `AppLocalizationsDelegate`
- a `supportedLocales` property that returns a list of all supported locales.
- a `localizationsDelegate` property that returns a list containing this delegate along with `GlobalMaterialLocalizations.delegate`, `GlobalCupertinoLocalizations.delegate`, and `GlobalWidgetsLocalizations.delegate`.
2. One Dart `message_<locale>.dart` file for each arb file, as well as a `messages_all.dart` file that performs the locale message lookup. The tool infers the locale of each arb file from the @@Locale property or the arb file's name.
