Remove trailing spaces in repo (#101191)

* Remove trailing spaces

* more

* empty commit

dev/docs/README.md

 **Welcome to the Flutter API reference documentation!**
 
-Flutter is Google's SDK for crafting beautiful, fast user experiences for 
+Flutter is Google's SDK for crafting beautiful, fast user experiences for
 mobile, web, and desktop from a single codebase. Flutter works with existing
 code, is used by developers and organizations around the world, and is free
 and open source.
@@ -57,8 +57,8 @@ import 'package:file/local.dart';
 ### Packages on pub.dev
 
 Flutter has a rich ecosystem of packages that have been contributed by the
-Flutter team and the broader open source community to a central repository. 
-Among the thousands of packages, you'll find support for Firebase, Google 
+Flutter team and the broader open source community to a central repository.
+Among the thousands of packages, you'll find support for Firebase, Google
 Fonts, hardware services like Bluetooth and camera, new widgets and
 animations, and integration with other popular web services. You can browse
 those packages at [pub.dev](https://pub.dev).

packages/flutter_tools/gradle/flutter.gradle

@@ -426,7 +426,7 @@ class FlutterPlugin implements Plugin<Project> {
 
     /**
      * Compares semantic versions ignoring labels.
-     * 
+     *
      * If the versions are equal (ignoring labels), returns one of the two strings arbitrarily.
      *
      * If minor or patch are omitted (non-conformant to semantic versioning), they are considered zero.
@@ -484,7 +484,7 @@ class FlutterPlugin implements Plugin<Project> {
                     }
                 }
             }
-        }  
+        }
     }
 
     /**

packages/flutter_tools/templates/app_shared/android-java.tmpl/app/build.gradle.tmpl

@@ -37,7 +37,7 @@ android {
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "{{androidIdentifier}}"
-        // You can update the following values to match your application needs. 
+        // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
         minSdkVersion flutter.minSdkVersion
         targetSdkVersion flutter.targetSdkVersion

packages/flutter_tools/templates/package/README.md.tmpl

-<!-- 
+<!--
 This README describes the package. If you publish this package to pub.dev,
 this README's contents appear on the landing page for your package.
 
 For information about how to write a good package README, see the guide for
-[writing package pages](https://dart.dev/guides/libraries/writing-package-pages). 
+[writing package pages](https://dart.dev/guides/libraries/writing-package-pages).
 
 For general information about developing packages, see the Dart guide for
 [creating packages](https://dart.dev/guides/libraries/create-library-packages)
 and the Flutter guide for
-[developing packages and plugins](https://flutter.dev/developing-packages). 
+[developing packages and plugins](https://flutter.dev/developing-packages).
 -->
 
 TODO: Put a short description of the package here that helps potential users
@@ -26,7 +26,7 @@ start using the package.
 ## Usage
 
 TODO: Include short and useful examples for package users. Add longer examples
-to `/example` folder. 
+to `/example` folder.
 
 ```dart
 const like = 'sample';
@@ -34,6 +34,6 @@ const like = 'sample';
 
 ## Additional information
 
-TODO: Tell users more about the package: where to find more information, how to 
-contribute to the package, how to file issues, what response they can expect 
+TODO: Tell users more about the package: where to find more information, how to
+contribute to the package, how to file issues, what response they can expect
 from the package authors, and more.

packages/flutter_tools/templates/plugin/lib/projectName_platform_interface.dart.tmpl

@@ -14,7 +14,7 @@ abstract class {{pluginDartClass}}Platform extends PlatformInterface {
   ///
   /// Defaults to [MethodChannel{{pluginDartClass}}].
   static {{pluginDartClass}}Platform get instance => _instance;
-  
+
   /// Platform-specific implementations should set this with their own
   /// platform-specific class that extends [{{pluginDartClass}}Platform] when
   /// they register themselves.

packages/flutter_tools/templates/plugin/test/projectName_test.dart.tmpl

@@ -4,7 +4,7 @@ import 'package:{{projectName}}/{{projectName}}_platform_interface.dart';
 import 'package:{{projectName}}/{{projectName}}_method_channel.dart';
 import 'package:plugin_platform_interface/plugin_platform_interface.dart';
 
-class Mock{{pluginDartClass}}Platform 
+class Mock{{pluginDartClass}}Platform
     with MockPlatformInterfaceMixin
     implements {{pluginDartClass}}Platform {
 
@@ -23,7 +23,7 @@ void main() {
     {{pluginDartClass}} {{pluginClassLowerCamelCase}} = {{pluginDartClass}}();
     Mock{{pluginDartClass}}Platform fakePlatform = Mock{{pluginDartClass}}Platform();
     {{pluginDartClass}}Platform.instance = fakePlatform;
-  
+
     expect(await {{pluginClassLowerCamelCase}}.getPlatformVersion(), '42');
   });
 }

packages/flutter_tools/templates/plugin_ffi/README.md.tmpl

@@ -4,7 +4,7 @@
 
 ## Getting Started
 
-This project is a starting point for a Flutter 
+This project is a starting point for a Flutter
 [FFI plugin](https://docs.flutter.dev/development/platform-integration/c-interop),
 a specialized package that includes native code directly invoked with Dart FFI.