refactor: typos correction

packages/pinball_components/lib/src/components/google_letter/google_letter.dart

@@ -22,7 +22,7 @@ class GoogleLetter extends BodyComponent with InitialPosition {
           ],
         );
 
-  /// Creates an [GoogleLetter] without any children.
+  /// Creates a [GoogleLetter] without any children.
   ///
   /// This can be used for testing [GoogleLetter]'s behaviors in isolation.
   // TODO(alestiago): Refactor injecting bloc once the following is merged:

packages/pinball_components/test/src/components/dash_nest_bumper/behaviors/dash_nest_bumper_ball_contact_behavior_test.dart

@@ -34,13 +34,13 @@ void main() {
             initialState: DashNestBumperState.active,
           );
 
-          final alienBumper = DashNestBumper.test(bloc: bloc);
-          await alienBumper.add(behavior);
-          await game.ensureAdd(alienBumper);
+          final dashNestBumper = DashNestBumper.test(bloc: bloc);
+          await dashNestBumper.add(behavior);
+          await game.ensureAdd(dashNestBumper);
 
           behavior.beginContact(MockBall(), MockContact());
 
-          verify(alienBumper.bloc.onBallContacted).called(1);
+          verify(dashNestBumper.bloc.onBallContacted).called(1);
         },
       );
     },

packages/pinball_components/test/src/components/dash_nest_bumper/dash_nest_bumper_test.dart

@@ -73,7 +73,7 @@ void main() {
         expect(dashNestBumper.children, contains(component));
       });
 
-      flameTester.test('an DashNestBumperBallContactBehavior', (game) async {
+      flameTester.test('a DashNestBumperBallContactBehavior', (game) async {
         final dashNestBumper = DashNestBumper.a();
         await game.ensureAdd(dashNestBumper);
         expect(

packages/pinball_components/test/src/components/google_letter/cubit/google_letter_cubit_test.dart

@@ -4,7 +4,7 @@ import 'package:pinball_components/pinball_components.dart';
 
 void main() {
   group(
-    'GoogleLetterBumperCubit',
+    'GoogleLetterCubit',
     () {
       blocTest<GoogleLetterCubit, GoogleLetterState>(
         'onBallContacted emits active',

packages/pinball_components/test/src/components/sparky_bumper/sparky_bumper_test.dart

@@ -71,7 +71,7 @@ void main() {
         expect(sparkyBumper.children, contains(component));
       });
 
-      flameTester.test('an SparkyBumperBallContactBehavior', (game) async {
+      flameTester.test('a SparkyBumperBallContactBehavior', (game) async {
         final sparkyBumper = SparkyBumper.a();
         await game.ensureAdd(sparkyBumper);
         expect(