Replace double-quotes with single quotes

Author: LuisDuarte1

example/build_extensions/example.dart

@@ -21,19 +21,19 @@ import 'package:test_api/scaffolding.dart';
 import 'mocks/example.mocks.dart';
 
 class Dog {
-  String sound() => "bark";
+  String sound() => 'bark';
   bool? eatFood(String? food) => true;
   Future<void> chew() async => print('Chewing...');
   int? walk(List<String>? places) => 1;
 }
 
 @GenerateNiceMocks([MockSpec<Dog>()])
 void main() {
-  test("Verify some dog behaviour", () async {
+  test('Verify some dog behaviour', () async {
     MockDog mockDog = MockDog();
     when(mockDog.eatFood(any));
 
-    mockDog.eatFood("biscuits");
+    mockDog.eatFood('biscuits');
 
     verify(mockDog.eatFood(any)).called(1);
   });

test/builder/auto_mocks_test.dart

@@ -3679,7 +3679,7 @@ void main() {
         }
         ''',
       }, config: {
-        "build_extensions": {"^test/{{}}.dart": "test/mocks/{{}}.mocks.dart"}
+        'build_extensions': {'^test/{{}}.dart': 'test/mocks/{{}}.mocks.dart'}
       });
       final mocksAsset = AssetId('foo', 'test/mocks/foo_test.mocks.dart');
       final mocksContent = utf8.decode(writer.assets[mocksAsset]!);
@@ -3703,9 +3703,9 @@ void main() {
         }
         ''',
           }, config: {
-            "build_extensions": {
-              "^test/{{}}.dart": "test/mocks/{{}}.mocks.dart",
-              "test/{{}}.dart": "test/{{}}.something.mocks.dart"
+            'build_extensions': {
+              '^test/{{}}.dart': 'test/mocks/{{}}.mocks.dart',
+              'test/{{}}.dart': 'test/{{}}.something.mocks.dart'
             }
           }),
           throwsArgumentError);
@@ -3735,7 +3735,7 @@ void main() {
         }
         ''',
           }, config: {
-            "build_extensions": {"^test/{{}}": "test/mocks/{{}}.mocks.dart"}
+            'build_extensions': {'^test/{{}}': 'test/mocks/{{}}.mocks.dart'}
           }),
           throwsArgumentError);
       final mocksAsset = AssetId('foo', 'test/mocks/foo_test.mocks.dart');
@@ -3761,7 +3761,7 @@ void main() {
         }
         ''',
           }, config: {
-            "build_extensions": {"^test/{{}}.dart": "test/mocks/{{}}.g.dart"}
+            'build_extensions': {'^test/{{}}.dart': 'test/mocks/{{}}.g.dart'}
           }),
           throwsArgumentError);
       final mocksAsset = AssetId('foo', 'test/mocks/foo_test.mocks.dart');