Remove errant double spaces (#110758)

dev/benchmarks/complex_layout/test/measure_scroll_smoothness.dart

@@ -181,7 +181,7 @@ Future<void> main() async {
 
 /// Calculates the smoothness measure from `scrollOffset` and `delays` list.
 ///
-/// Smoothness (`abs_jerk`) is measured by  the absolute value of the discrete
+/// Smoothness (`abs_jerk`) is measured by the absolute value of the discrete
 /// 2nd derivative of the scroll offset.
 ///
 /// It was experimented that jerk (3rd derivative of the position) is a good

dev/benchmarks/microbenchmarks/lib/foundation/platform_asset_bundle.dart

@@ -24,7 +24,7 @@ void main() async {
     watch.reset();
     watch.start();
     for (int i = 0; i < _kBatchSize; i += 1) {
-      // Note: We don't load images like this.  PlatformAssetBundle is used for
+      // Note: We don't load images like this. PlatformAssetBundle is used for
       // other assets (like Rive animations). We are using an image because it's
       // conveniently sized and available for the test.
       tally += (await bundle.load('packages/flutter_gallery_assets/places/india_pondicherry_salt_farm.png')).lengthInBytes;

dev/benchmarks/platform_channels_benchmarks/lib/main.dart

@@ -8,7 +8,6 @@ import 'dart:math' as math;
 import 'package:flutter/foundation.dart' show kDebugMode;
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-
 import 'package:microbenchmarks/common.dart';
 
 List<Object?> _makeTestBuffer(int size) {
@@ -195,7 +194,7 @@ Future<void> _runTests() async {
   );
 
   /// WARNING: Don't change the following line of code, it will invalidate
-  /// `Large` tests.  Instead make a different test.  The size of largeBuffer
+  /// `Large` tests. Instead make a different test. The size of largeBuffer
   /// serialized is 14214 bytes.
   final List<Object?> largeBuffer = _makeTestBuffer(1000);
   final ByteData largeBufferBytes =

dev/bots/analyze_snippet_code.dart

@@ -443,7 +443,7 @@ class _SnippetChecker {
 
   /// The directory for the dart:ui code to be analyzed with the flutter code.
   ///
-  /// If this is null, then no dart:ui code is included in the analysis.  It
+  /// If this is null, then no dart:ui code is included in the analysis. It
   /// defaults to the location inside of the flutter bin/cache directory that
   /// contains the dart:ui code supplied by the engine.
   final Directory? _dartUiLocation;

dev/bots/prepare_package.dart

@@ -185,7 +185,7 @@ typedef HttpReader = Future<Uint8List> Function(Uri url, {Map<String, String> he
 
 /// Creates a pre-populated Flutter archive from a git repo.
 class ArchiveCreator {
-  /// [tempDir] is the directory to use for creating the archive.  The script
+  /// [tempDir] is the directory to use for creating the archive. The script
   /// will place several GiB of data there, so it should have available space.
   ///
   /// The processManager argument is used to inject a mock of [ProcessManager] for
@@ -263,7 +263,7 @@ class ArchiveCreator {
   /// platform we're running on.
   final Platform platform;
 
-  /// The branch to build the archive for.  The branch must contain [revision].
+  /// The branch to build the archive for. The branch must contain [revision].
   final Branch branch;
 
   /// The git revision hash to build the archive for. This revision has
@@ -385,7 +385,7 @@ class ArchiveCreator {
   /// git will give an error.
   ///
   /// If [strict] is true, the exact [revision] must be tagged to return the
-  /// version.  If [strict] is not true, will look backwards in time starting at
+  /// version. If [strict] is not true, will look backwards in time starting at
   /// [revision] to find the most recent version tag.
   ///
   /// The version found as a git tag is added to the information given by

dev/bots/test.dart

@@ -186,7 +186,7 @@ const Map<String, List<String>> kWebTestFileKnownFailures = <String, List<String
 const String kTestHarnessShardName = 'test_harness_tests';
 const List<String> _kAllBuildModes = <String>['debug', 'profile', 'release'];
 
-// The seed used to shuffle tests.  If not passed with
+// The seed used to shuffle tests. If not passed with
 // --test-randomize-ordering-seed=<seed> on the command line, it will be set the
 // first time it is accessed. Pass zero to turn off shuffling.
 String? _shuffleSeed;

dev/bots/unpublish_package.dart

@@ -429,7 +429,7 @@ Future<void> main(List<String> rawArguments) async {
     'confirm',
     help: 'If set, will actually remove the archive from Google Cloud Storage '
         'upon successful execution of this script. Published archives will be '
-        'removed from this directory: $baseUrl$releaseFolder.  This option '
+        'removed from this directory: $baseUrl$releaseFolder. This option '
         'must be set to perform any action on the server, otherwise only a dry '
         'run is performed.',
   );
@@ -479,7 +479,7 @@ Future<void> main(List<String> rawArguments) async {
   }
 
   if (!(parsedArguments['confirm'] as bool)) {
-    _printBanner('This will be just a dry run.  To actually perform the changes below, re-run with --confirm argument.');
+    _printBanner('This will be just a dry run. To actually perform the changes below, re-run with --confirm argument.');
   }
 
   final List<String> channelArg = parsedArguments['channel'] as List<String>;
@@ -518,7 +518,7 @@ Future<void> main(List<String> rawArguments) async {
       errorExit('$message\n$stack', exitCode: exitCode);
     }
     if (!(parsedArguments['confirm'] as bool)) {
-      _printBanner('This was just a dry run.  To actually perform the above changes, re-run with --confirm argument.');
+      _printBanner('This was just a dry run. To actually perform the above changes, re-run with --confirm argument.');
     }
     exit(0);
   }

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

@@ -194,9 +194,9 @@ class _ChipDemoState extends State<ChipDemo> {
   }
 
   // This converts a String to a unique color, based on the hash value of the
-  // String object.  It takes the bottom 16 bits of the hash, and uses that to
+  // String object. It takes the bottom 16 bits of the hash, and uses that to
   // pick a hue for an HSV color, and then creates the color (with a preset
-  // saturation and value).  This means that any unique strings will also have
+  // saturation and value). This means that any unique strings will also have
   // unique colors, but they'll all be readable, since they have the same
   // saturation and value.
   Color _nameToColor(String name, ThemeData theme) {

dev/tools/dartdoc.dart

@@ -255,7 +255,7 @@ ArgParser _createArgsParser() {
       help: 'Show command help.');
   parser.addFlag('verbose', defaultsTo: true,
       help: 'Whether to report all error messages (on) or attempt to '
-          'filter out some known false positives (off).  Shut this off '
+          'filter out some known false positives (off). Shut this off '
           'locally if you want to address Flutter-specific issues.');
   parser.addFlag('checked', abbr: 'c',
       help: 'Run dartdoc in checked mode.');

dev/tools/localization/bin/gen_subtag_registry.dart

@@ -7,8 +7,8 @@ import 'dart:io';
 
 const String registry = 'https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry';
 
-/// A script to generate a Dart cache of https://www.iana.org.  This should be
-/// run occasionally.  It was created since iana.org was found to be flakey.
+/// A script to generate a Dart cache of https://www.iana.org. This should be
+/// run occasionally. It was created since iana.org was found to be flakey.
 ///
 /// To execute: dart gen_subtag_registry.dart > language_subtag_registry.dart
 Future<void> main() async {

examples/api/lib/animation/curves/curve2_d.0.dart

@@ -71,7 +71,7 @@ class _FollowCurve2DState extends State<FollowCurve2D>
     super.initState();
     controller = AnimationController(duration: widget.duration, vsync: this);
     animation = CurvedAnimation(parent: controller, curve: widget.curve);
-    // Have the controller repeat indefinitely.  If you want it to "bounce" back
+    // Have the controller repeat indefinitely. If you want it to "bounce" back
     // and forth, set the reverse parameter to true.
     controller.repeat();
     controller.addListener(() => setState(() {}));

examples/api/lib/material/text_field/text_field.2.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flutter code sample for  Material Design 3 TextFields.
+// Flutter code sample for Material Design 3 TextFields.
 
 import 'package:flutter/material.dart';
 

packages/flutter/lib/src/animation/curves.dart

@@ -508,7 +508,7 @@ abstract class Curve2D extends ParametricCurve<Offset> {
     double end = 1.0,
     double tolerance = 1e-10,
   }) {
-    // The sampling  algorithm is:
+    // The sampling algorithm is:
     // 1. Evaluate the area of the triangle (a proxy for the "flatness" of the
     //    curve) formed by two points and a test point.
     // 2. If the area of the triangle is small enough (below tolerance), then
@@ -675,7 +675,7 @@ class CatmullRomSpline extends Curve2D {
   /// interpolate.
   ///
   /// The internal curve data structures are lazily computed the first time
-  /// [transform] is called.  If you would rather pre-compute the structures,
+  /// [transform] is called. If you would rather pre-compute the structures,
   /// use [CatmullRomSpline.precompute] instead.
   CatmullRomSpline(
       List<Offset> controlPoints, {
@@ -851,7 +851,7 @@ class CatmullRomCurve extends Curve {
   /// is equivalent to a linear interpolation between points.
   ///
   /// The internal curve data structures are lazily computed the first time
-  /// [transform] is called.  If you would rather pre-compute the curve, use
+  /// [transform] is called. If you would rather pre-compute the curve, use
   /// [CatmullRomCurve.precompute] instead.
   ///
   /// All of the arguments must not be null.

packages/flutter/lib/src/cupertino/dialog.dart

@@ -918,7 +918,7 @@ class _CupertinoDialogRenderElement extends RenderObjectElement {
 //
 // If all content and buttons do not fit on screen, and iOS is NOT in accessibility mode:
 // A minimum height for the action button section is calculated. The action
-// button section will not be rendered shorter than this minimum.  See
+// button section will not be rendered shorter than this minimum. See
 // [_RenderCupertinoDialogActions] for the minimum height calculation.
 //
 // With the minimum action button section calculated, the content section can
@@ -1335,7 +1335,7 @@ enum _AlertDialogSections {
 
 // The "content section" of a CupertinoAlertDialog.
 //
-// If title is missing, then only content is added.  If content is
+// If title is missing, then only content is added. If content is
 // missing, then only title is added. If both are missing, then it returns
 // a SingleChildScrollView with a zero-sized Container.
 class _CupertinoAlertContentSection extends StatelessWidget {
@@ -2254,7 +2254,7 @@ class _RenderCupertinoDialogActions extends RenderBox
 
   void _drawButtonBackgroundsAndDividersSingleRow(Canvas canvas, Offset offset) {
     // The vertical divider sits between the left button and right button (if
-    // the dialog has 2 buttons).  The vertical divider is hidden if either the
+    // the dialog has 2 buttons). The vertical divider is hidden if either the
     // left or right button is pressed.
     final Rect verticalDivider = childCount == 2 && !_isButtonPressed
         ? Rect.fromLTWH(

packages/flutter/lib/src/cupertino/icons.dart

@@ -187,14 +187,14 @@ class CupertinoIcons {
   ///  * [check_mark_circled], which is similar, but not filled in.
   static const IconData check_mark_circled_solid = IconData(0xf3ff, fontFamily: iconFont, fontPackage: iconFontPackage);
 
-  /// <i class='cupertino-icons md-36'>circle</i> &#x2014; Cupertino icon for an empty circle (a ring).  An un-selected radio button.
+  /// <i class='cupertino-icons md-36'>circle</i> &#x2014; Cupertino icon for an empty circle (a ring). An un-selected radio button.
   ///
   /// See also:
   ///
   ///  * [circle_filled], which is similar but filled in.
   static const IconData circle = IconData(0xf401, fontFamily: iconFont, fontPackage: iconFontPackage);
 
-  /// <i class='cupertino-icons md-36'>circle_fill</i> &#x2014; Cupertino icon for a filled circle.  The circle is surrounded by a ring.  A selected radio button.
+  /// <i class='cupertino-icons md-36'>circle_fill</i> &#x2014; Cupertino icon for a filled circle. The circle is surrounded by a ring. A selected radio button.
   /// This is the same icon as [circle_fill] in cupertino_icons 1.0.0+.
   ///
   /// See also:

packages/flutter/lib/src/cupertino/picker.dart

@@ -66,8 +66,8 @@ class CupertinoPicker extends StatefulWidget {
   /// the current picker index or for selecting an initial index value.
   ///
   /// The [looping] argument decides whether the child list loops and can be
-  /// scrolled infinitely.  If set to true, scrolling past the end of the list
-  /// will loop the list back to the beginning.  If set to false, the list will
+  /// scrolled infinitely. If set to true, scrolling past the end of the list
+  /// will loop the list back to the beginning. If set to false, the list will
   /// stop scrolling when you reach the end or the beginning.
   CupertinoPicker({
     super.key,

packages/flutter/lib/src/cupertino/tab_scaffold.dart

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/widgets.dart';
+
 import 'bottom_tab_bar.dart';
 import 'colors.dart';
 import 'theme.dart';
@@ -457,7 +458,7 @@ class _TabSwitchingViewState extends State<_TabSwitchingView> {
     _focusActiveTab();
   }
 
-  // Will focus the active tab if the FocusScope above it has focus already.  If
+  // Will focus the active tab if the FocusScope above it has focus already. If
   // not, then it will just mark it as the preferred focus for that scope.
   void _focusActiveTab() {
     if (tabFocusNodes.length != widget.tabCount) {

packages/flutter/lib/src/foundation/binding.dart

@@ -6,6 +6,7 @@ import 'dart:convert' show json;
 import 'dart:developer' as developer;
 import 'dart:io' show exit;
 import 'dart:ui' as ui show Brightness, PlatformDispatcher, SingletonFlutterWindow, window;
+
 // Before adding any more dart:ui imports, please read the README.
 
 import 'package:meta/meta.dart';
@@ -178,8 +179,8 @@ abstract class BindingBase {
   /// Each of these other bindings could individually access a
   /// [ui.SingletonFlutterWindow] statically, but that would preclude the
   /// ability to test its behaviors with a fake window for verification
-  /// purposes.  Therefore, [BindingBase] exposes this
-  /// [ui.SingletonFlutterWindow] for use by other bindings.  A subclass of
+  /// purposes. Therefore, [BindingBase] exposes this
+  /// [ui.SingletonFlutterWindow] for use by other bindings. A subclass of
   /// [BindingBase], such as [TestWidgetsFlutterBinding], can override this
   /// accessor to return a different [ui.SingletonFlutterWindow] implementation,
   /// such as a [TestWindow].

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

@@ -485,7 +485,7 @@ class AppBar extends StatefulWidget implements PreferredSizeWidget {
   /// The shape of the app bar's [Material] as well as its shadow.
   ///
   /// If this property is null, then [AppBarTheme.shape] of
-  /// [ThemeData.appBarTheme] is used.  Both properties default to null.
+  /// [ThemeData.appBarTheme] is used. Both properties default to null.
   /// If both properties are null then the shape of the app bar's [Material]
   /// is just a simple rectangle.
   ///
@@ -561,7 +561,7 @@ class AppBar extends StatefulWidget implements PreferredSizeWidget {
   ///
   /// The AppBar is built within a `AnnotatedRegion<SystemUiOverlayStyle>`
   /// which causes [SystemChrome.setSystemUIOverlayStyle] to be called
-  /// automatically.  Apps should not enclose the AppBar with
+  /// automatically. Apps should not enclose the AppBar with
   /// their own [AnnotatedRegion].
   /// {@endtemplate}
   ///
@@ -780,7 +780,7 @@ class AppBar extends StatefulWidget implements PreferredSizeWidget {
   /// The AppBar's descendants are built within a
   /// `AnnotatedRegion<SystemUiOverlayStyle>` widget, which causes
   /// [SystemChrome.setSystemUIOverlayStyle] to be called
-  /// automatically.  Apps should not enclose an AppBar with their
+  /// automatically. Apps should not enclose an AppBar with their
   /// own [AnnotatedRegion].
   /// {@endtemplate}
   //

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

@@ -74,7 +74,7 @@ import 'theme_data.dart';
 /// Configuring a ButtonStyle directly makes it possible to very
 /// precisely control the button’s visual attributes for all states.
 /// This level of control is typically required when a custom
-/// “branded” look and feel is desirable.  However, in many cases it’s
+/// “branded” look and feel is desirable. However, in many cases it’s
 /// useful to make relatively sweeping changes based on a few initial
 /// parameters with simple values. The button styleFrom() methods
 /// enable such sweeping changes. See for example:

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

@@ -2068,7 +2068,7 @@ class _RenderChip extends RenderBox with SlottedContainerRenderObjectMixin<_Chip
   }
 
   // Set this to true to have outlines of the tap targets drawn over
-  // the chip.  This should never be checked in while set to 'true'.
+  // the chip. This should never be checked in while set to 'true'.
   static const bool _debugShowTapTargetOutlines = false;
 
   @override

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

@@ -869,7 +869,7 @@ class _DatePickerHeader extends StatelessWidget {
 ///
 ///   * [helpText], the label displayed at the top of the dialog.
 ///   * [cancelText], the label on the cancel button for the text input mode.
-///   * [confirmText],the  label on the ok button for the text input mode.
+///   * [confirmText],the label on the ok button for the text input mode.
 ///   * [saveText], the label on the save button for the fullscreen calendar
 ///     mode.
 ///   * [errorFormatText], the message used when an input text isn't in a proper

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

@@ -922,7 +922,7 @@ class SimpleDialog extends StatelessWidget {
   /// announce screen transitions when the dialog is opened and closed.
   ///
   /// If this label is not provided, a semantic label will be inferred from the
-  /// [title] if it is not null.  If there is no title, the label will be taken
+  /// [title] if it is not null. If there is no title, the label will be taken
   /// from [MaterialLocalizations.dialogLabel].
   ///
   /// See also:

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

@@ -22,7 +22,7 @@ import 'theme_data.dart';
 /// A Material Design "elevated button".
 ///
 /// Use elevated buttons to add dimension to otherwise mostly flat
-/// layouts, e.g.  in long busy lists of content, or in wide
+/// layouts, e.g. in long busy lists of content, or in wide
 /// spaces. Avoid using elevated buttons on already-elevated content
 /// such as dialogs or cards.
 ///
@@ -33,7 +33,7 @@ import 'theme_data.dart';
 /// background is the [ButtonStyle.backgroundColor].
 ///
 /// The elevated button's default style is defined by
-/// [defaultStyleOf].  The style of this elevated button can be
+/// [defaultStyleOf]. The style of this elevated button can be
 /// overridden with its [style] parameter. The style of all elevated
 /// buttons in a subtree can be overridden with the
 /// [ElevatedButtonTheme], and the style of all of the elevated

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

@@ -16,7 +16,7 @@ import 'theme.dart';
 /// overall [Theme]'s [ThemeData.elevatedButtonTheme].
 ///
 /// The [style]'s properties override [ElevatedButton]'s default style,
-/// i.e.  the [ButtonStyle] returned by [ElevatedButton.defaultStyleOf]. Only
+/// i.e. the [ButtonStyle] returned by [ElevatedButton.defaultStyleOf]. Only
 /// the style's non-null property values or resolved non-null
 /// [MaterialStateProperty] values are used.
 ///

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

@@ -415,7 +415,7 @@ class FlexibleSpaceBarSettings extends InheritedWidget {
   ///
   /// This value is used by the [AppBar] to resolve
   /// [AppBar.backgroundColor] against [MaterialState.scrolledUnder],
-  /// i.e.  to enable apps to specify different colors when content
+  /// i.e. to enable apps to specify different colors when content
   /// has been scrolled up and behind the app bar.
   ///
   /// Null if the caller hasn't determined if the FlexibleSpaceBar

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

@@ -62,7 +62,7 @@ enum _FloatingActionButtonType {
 ///
 /// {@tool dartpad}
 /// This example shows how to make an extended [FloatingActionButton] in a
-/// [Scaffold], with a  pink [backgroundColor], a thumbs up [Icon] and a
+/// [Scaffold], with a pink [backgroundColor], a thumbs up [Icon] and a
 /// [Text] label that reads "Approve".
 ///
 /// ![](https://flutter.github.io/assets-for-api-docs/assets/material/floating_action_button_label.png)

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

@@ -501,7 +501,7 @@ class InkResponse extends StatelessWidget {
   /// [MaterialState.pressed] triggers a ripple (an ink splash), per
   /// the current Material Design spec. The [overlayColor] doesn't map
   /// a state to [highlightColor] because a separate highlight is not
-  /// used by the current design guidelines.  See
+  /// used by the current design guidelines. See
   /// https://material.io/design/interaction/states.html#pressed
   ///
   /// If the overlay color is null or resolves to null, then [focusColor],