Typo sweep (#60693)

dev/integration_tests/flutter_gallery/lib/demo/material/backdrop_demo.dart

@@ -146,7 +146,7 @@ class CategoryView extends StatelessWidget {
 }
 
 // One BackdropPanel is visible at a time. It's stacked on top of the
-// the BackdropDemo.
+// BackdropDemo.
 class BackdropPanel extends StatelessWidget {
   const BackdropPanel({
     Key key,

dev/integration_tests/flutter_gallery/test/demo/material/text_form_field_demo_test.dart

@@ -22,7 +22,7 @@ void main() {
     final Finder passwordField = find.widgetWithText(TextFormField, 'Password *');
     expect(passwordField, findsOneWidget);
 
-    // Verify the that the phone number's TextInputFormatter does what's expected.
+    // Verify that the phone number's TextInputFormatter does what's expected.
     await tester.enterText(phoneNumberField, '1234567890');
     await tester.pumpAndSettle();
     expect(find.text('(123) 456-7890'), findsOneWidget);

packages/flutter/lib/src/material/navigation_rail.dart

@@ -166,7 +166,7 @@ class NavigationRail extends StatefulWidget {
   ///
   /// The extended state has a wider rail container, and the labels are
   /// positioned next to the icons. [minExtendedWidth] can be used to set the
-  /// the minimum width of the rail when it is in this state.
+  /// minimum width of the rail when it is in this state.
   ///
   /// The rail will implicitly animate between the extended and normal state.
   ///

packages/flutter/lib/src/material/scaffold.dart

@@ -1034,9 +1034,8 @@ class Scaffold extends StatefulWidget {
   /// instead of only extending to the top of the [bottomNavigationBar]
   /// or the [persistentFooterButtons].
   ///
-  /// If true, a [MediaQuery] widget whose bottom padding matches the
-  /// the height of the [bottomNavigationBar] will be added above the
-  /// scaffold's [body].
+  /// If true, a [MediaQuery] widget whose bottom padding matches the height
+  /// of the [bottomNavigationBar] will be added above the scaffold's [body].
   ///
   /// This property is often useful when the [bottomNavigationBar] has
   /// a non-rectangular shape, like [CircularNotchedRectangle], which

packages/flutter/lib/src/widgets/inherited_theme.dart

@@ -123,7 +123,7 @@ abstract class InheritedTheme extends InheritedWidget {
         final Type themeType = theme.runtimeType;
         // Only remember the first theme of any type. This assumes
         // that inherited themes completely shadow ancestors of the
-        // the same type.
+        // same type.
         if (!themeTypes.contains(themeType)) {
           themeTypes.add(themeType);
           themes.add(theme);

packages/flutter/lib/src/widgets/nested_scroll_view.dart

@@ -545,7 +545,7 @@ class NestedScrollViewState extends State<NestedScrollView> {
   /// See also:
   ///
   ///  * [outerController], which exposes the [ScrollController] used by the
-  ///    the sliver(s) contained in [NestedScrollView.headerSliverBuilder].
+  ///    sliver(s) contained in [NestedScrollView.headerSliverBuilder].
   ScrollController get innerController => _coordinator._innerController;
 
   /// The [ScrollController] provided to the [ScrollView] in

packages/flutter/lib/src/widgets/routes.dart

@@ -182,7 +182,7 @@ abstract class TransitionRoute<T> extends OverlayRoute<T> {
         break;
       case AnimationStatus.dismissed:
         // We might still be an active route if a subclass is controlling the
-        // the transition and hits the dismissed status. For example, the iOS
+        // transition and hits the dismissed status. For example, the iOS
         // back gesture drives this animation to the dismissed status before
         // removing the route and disposing it.
         if (!isActive) {

packages/flutter/lib/src/widgets/sliver_fill.dart

@@ -201,9 +201,9 @@ class _RenderSliverFractionalPadding extends RenderSliverEdgeInsetsPadding {
 /// account in deciding how to layout this sliver.
 ///
 /// [SliverFillRemaining] will size its [child] to fill the viewport in the
-/// main axis if that space is larger than the child's extent, and the
-/// the amount of space that has been scrolled beforehand has not exceeded the
-/// main axis extent of the viewport.
+/// main axis if that space is larger than the child's extent, and the amount
+/// of space that has been scrolled beforehand has not exceeded the main axis
+/// extent of the viewport.
 ///
 /// {@tool dartpad --template=stateless_widget_scaffold}
 ///

packages/flutter/test/cupertino/text_field_test.dart

@@ -1680,7 +1680,7 @@ void main() {
       await tester.pump();
 
       // Plain collapsed selection at the edge of first word. In iOS 12, the
-      // the first tap after a double tap ends up putting the cursor at where
+      // first tap after a double tap ends up putting the cursor at where
       // you tapped instead of the edge like every other single tap. This is
       // likely a bug in iOS 12 and not present in other versions.
       expect(

packages/flutter/test/material/text_field_test.dart

@@ -6497,7 +6497,7 @@ void main() {
       await tester.pump();
 
       // Plain collapsed selection at the edge of first word. In iOS 12, the
-      // the first tap after a double tap ends up putting the cursor at where
+      // first tap after a double tap ends up putting the cursor at where
       // you tapped instead of the edge like every other single tap. This is
       // likely a bug in iOS 12 and not present in other versions.
       expect(

packages/flutter/test/widgets/selectable_text_test.dart

@@ -2695,7 +2695,7 @@ void main() {
       await tester.pump();
 
       // Plain collapsed selection at the edge of first word. In iOS 12, the
-      // the first tap after a double tap ends up putting the cursor at where
+      // first tap after a double tap ends up putting the cursor at where
       // you tapped instead of the edge like every other single tap. This is
       // likely a bug in iOS 12 and not present in other versions.
       expect(
@@ -3493,7 +3493,7 @@ void main() {
       expect(
         tester.getSize(find.byType(SelectableText)),
         // When the strut fontSize is larger than a provided TextStyle, the
-        // the strut's height takes precedence.
+        // strut's height takes precedence.
         const Size(93.0, 54.0),
       );
     },

packages/flutter_test/lib/src/binding.dart

@@ -478,7 +478,7 @@ abstract class TestWidgetsFlutterBinding extends BindingBase
 
   /// The current client of the onscreen keyboard. Callers must pump
   /// an additional frame after setting this property to complete the
-  /// the focus change.
+  /// focus change.
   ///
   /// Instead of setting this directly, consider using
   /// [WidgetTester.showKeyboard].

packages/flutter_tools/lib/src/build_system/targets/web.dart

@@ -503,7 +503,7 @@ self.addEventListener("fetch", (event) => {
   if (event.request.url == origin || event.request.url.startsWith(origin + '/#')) {
     key = '/';
   }
-  // If the URL is not the the RESOURCE list, skip the cache.
+  // If the URL is not the RESOURCE list, skip the cache.
   if (!RESOURCES[key]) {
     return event.respondWith(fetch(event.request));
   }

packages/flutter_tools/lib/src/fuchsia/fuchsia_pm.dart

@@ -164,7 +164,7 @@ class FuchsiaPM {
 ///
 /// [FuchsiaPackageServer] takes care of initializing the package repository,
 /// spinning up the package server, publishing packages, and shutting down the
-/// the server.
+/// server.
 ///
 /// Example usage:
 /// var server = FuchsiaPackageServer(