update generated localized message files in the stocks test app (#148741)

Fixes flutter/flutter#149386. Fixes flutter/flutter#106150.

The stocks test app includes Dart files containing localized messages generated by `package:flutter_localizations`. However, these files appear to have become out of date. Running `pub get` in the project will regenerate these files and generate a diff, which can be annoying when working on the repo.

This PR generates the files. ~~It also updates the templates for these files to be compliant with flutter/flutter repo lint rules, including `noop_primitive_operations` and `use_super_parameters`.~~ It also adds `// ignore_for_file: type=lint` to these files to disable linting for these files. This avoids issues like  flutter/flutter#106150 and [this](flutter/flutter#148741 (comment)).

Author: andrewkolos

dev/benchmarks/test_apps/stocks/lib/i18n/regenerate.md

@@ -1,6 +1,6 @@
 # Regenerating the i18n files
 
-The files in this directory are used to generate `stock_strings.dart`,
+The arb files in this directory are used to generate `stock_strings.dart`,
 which contains the `StockStrings` class. This localizations class is
 used by the stocks application to look up localized message strings.
 The stocks app uses the [Dart `intl` package](https://github.com/dart-lang/intl).

dev/benchmarks/test_apps/stocks/lib/i18n/stock_strings.dart

@@ -14,12 +14,14 @@ import 'package:intl/intl.dart' as intl;
 import 'stock_strings_en.dart';
 import 'stock_strings_es.dart';
 
-/// Callers can lookup localized strings with an instance of StockStrings returned
-/// by `StockStrings.of(context)`.
+// ignore_for_file: type=lint
+
+/// Callers can lookup localized strings with an instance of StockStrings
+/// returned by `StockStrings.of(context)`.
 ///
 /// Applications need to include `StockStrings.delegate()` in their app's
-/// localizationDelegates list, and the locales they support in the app's
-/// supportedLocales list. For example:
+/// `localizationDelegates` list, and the locales they support in the app's
+/// `supportedLocales` list. For example:
 ///
 /// ```dart
 /// import 'i18n/stock_strings.dart';
@@ -43,7 +45,7 @@ import 'stock_strings_es.dart';
 ///     sdk: flutter
 ///   intl: any # Use the pinned version from flutter_localizations
 ///
-///   # rest of dependencies
+///   # Rest of dependencies
 /// ```
 ///
 /// ## iOS Applications
@@ -66,7 +68,7 @@ import 'stock_strings_es.dart';
 /// be consistent with the languages listed in the StockStrings.supportedLocales
 /// property.
 abstract class StockStrings {
-  StockStrings(String locale) : localeName = intl.Intl.canonicalizedLocale(locale);
+  StockStrings(String locale) : localeName = intl.Intl.canonicalizedLocale(locale.toString());
 
   final String localeName;
 
@@ -97,7 +99,7 @@ abstract class StockStrings {
   static const List<Locale> supportedLocales = <Locale>[
     Locale('en'),
     Locale('en', 'US'),
-    Locale('es'),
+    Locale('es')
   ];
 
   /// Title for the Stocks application
@@ -124,7 +126,7 @@ class _StockStringsDelegate extends LocalizationsDelegate<StockStrings> {
 
   @override
   Future<StockStrings> load(Locale locale) {
-    return SynchronousFuture<StockStrings>(_lookupStockStrings(locale));
+    return SynchronousFuture<StockStrings>(lookupStockStrings(locale));
   }
 
   @override
@@ -134,16 +136,16 @@ class _StockStringsDelegate extends LocalizationsDelegate<StockStrings> {
   bool shouldReload(_StockStringsDelegate old) => false;
 }
 
-StockStrings _lookupStockStrings(Locale locale) {
+StockStrings lookupStockStrings(Locale locale) {
 
   // Lookup logic when language+country codes are specified.
   switch (locale.languageCode) {
     case 'en': {
-      switch (locale.countryCode) {
-        case 'US': return StockStringsEnUs();
-      }
-      break;
-    }
+  switch (locale.countryCode) {
+    case 'US': return StockStringsEnUs();
+   }
+  break;
+   }
   }
 
   // Lookup logic when only language code is specified.

dev/benchmarks/test_apps/stocks/lib/i18n/stock_strings_en.dart

@@ -5,12 +5,13 @@
 // THE FOLLOWING FILES WERE GENERATED BY `flutter gen-l10n`.
 
 
-
 import 'stock_strings.dart';
 
+// ignore_for_file: type=lint
+
 /// The translations for English (`en`).
 class StockStringsEn extends StockStrings {
-  StockStringsEn([super.locale = 'en']);
+  StockStringsEn([String locale = 'en']) : super(locale);
 
   @override
   String get title => 'Stocks';

dev/benchmarks/test_apps/stocks/lib/i18n/stock_strings_es.dart

@@ -5,12 +5,13 @@
 // THE FOLLOWING FILES WERE GENERATED BY `flutter gen-l10n`.
 
 
-
 import 'stock_strings.dart';
 
+// ignore_for_file: type=lint
+
 /// The translations for Spanish Castilian (`es`).
 class StockStringsEs extends StockStrings {
-  StockStringsEs([super.locale = 'es']);
+  StockStringsEs([String locale = 'es']) : super(locale);
 
   @override
   String get title => 'Acciones';

packages/flutter_tools/lib/src/localizations/gen_l10n_templates.dart

@@ -18,6 +18,8 @@ import 'package:intl/intl.dart' as intl;
 
 @(messageClassImports)
 
+// ignore_for_file: type=lint
+
 /// Callers can lookup localized strings with an instance of @(class)
 /// returned by `@(class).of(context)`.
 ///
@@ -171,6 +173,8 @@ const String dateVariableTemplate = '''
 const String classFileTemplate = '''
 @(header)@(requiresIntlImport)import '@(fileName)';
 
+// ignore_for_file: type=lint
+
 /// The translations for @(language) (`@(localeName)`).
 class @(class) extends @(baseClass) {
   @(class)([String locale = '@(localeName)']) : super(locale);

packages/flutter_tools/test/general.shard/generate_localizations_test.dart

@@ -794,6 +794,8 @@ HEADER
 
 import 'bar.dart';
 
+// ignore_for_file: type=lint
+
 /// The translations for English (`en`).
 class FooEn extends Foo {
   FooEn([String locale = 'en']) : super(locale);
@@ -894,6 +896,8 @@ flutter:\r
       expect(fs.file('/lib/l10n/app_localizations_en.dart').readAsStringSync(), '''
 import 'app_localizations.dart';
 
+// ignore_for_file: type=lint
+
 /// The translations for English (`en`).
 class AppLocalizationsEn extends AppLocalizations {
   AppLocalizationsEn([String locale = 'en']) : super(locale);
@@ -925,6 +929,8 @@ HEADER
 
 import 'app_localizations.dart';
 
+// ignore_for_file: type=lint
+
 /// The translations for English (`en`).
 class AppLocalizationsEn extends AppLocalizations {
   AppLocalizationsEn([String locale = 'en']) : super(locale);