add missing trailing commas (#79434)

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

@@ -454,7 +454,7 @@ class AnimationController extends Animation<double>
     assert(
       _ticker != null,
       'AnimationController.forward() called after AnimationController.dispose()\n'
-      'AnimationController methods should not be used after calling dispose.'
+      'AnimationController methods should not be used after calling dispose.',
     );
     _direction = _AnimationDirection.forward;
     if (from != null)
@@ -487,7 +487,7 @@ class AnimationController extends Animation<double>
     assert(
       _ticker != null,
       'AnimationController.reverse() called after AnimationController.dispose()\n'
-      'AnimationController methods should not be used after calling dispose.'
+      'AnimationController methods should not be used after calling dispose.',
     );
     _direction = _AnimationDirection.reverse;
     if (from != null)
@@ -526,7 +526,7 @@ class AnimationController extends Animation<double>
     assert(
       _ticker != null,
       'AnimationController.animateTo() called after AnimationController.dispose()\n'
-      'AnimationController methods should not be used after calling dispose.'
+      'AnimationController methods should not be used after calling dispose.',
     );
     _direction = _AnimationDirection.forward;
     return _animateToInternal(target, duration: duration, curve: curve);
@@ -559,7 +559,7 @@ class AnimationController extends Animation<double>
     assert(
       _ticker != null,
       'AnimationController.animateBack() called after AnimationController.dispose()\n'
-      'AnimationController methods should not be used after calling dispose.'
+      'AnimationController methods should not be used after calling dispose.',
     );
     _direction = _AnimationDirection.reverse;
     return _animateToInternal(target, duration: duration, curve: curve);
@@ -704,7 +704,7 @@ class AnimationController extends Animation<double>
     assert(
       simulation.type != SpringType.underDamped,
       'The resulting spring simulation is of type SpringType.underDamped.\n'
-      'This can lead to unexpected look of the animation, please adjust the springDescription parameter'
+      'This can lead to unexpected look of the animation, please adjust the springDescription parameter',
     );
     stop();
     return _startSimulation(simulation);
@@ -728,7 +728,7 @@ class AnimationController extends Animation<double>
     assert(
       _ticker != null,
       'AnimationController.animateWith() called after AnimationController.dispose()\n'
-      'AnimationController methods should not be used after calling dispose.'
+      'AnimationController methods should not be used after calling dispose.',
     );
     stop();
     _direction = _AnimationDirection.forward;
@@ -770,7 +770,7 @@ class AnimationController extends Animation<double>
     assert(
       _ticker != null,
       'AnimationController.stop() called after AnimationController.dispose()\n'
-      'AnimationController methods should not be used after calling dispose.'
+      'AnimationController methods should not be used after calling dispose.',
     );
     _simulation = null;
     _lastElapsedDuration = null;

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

@@ -238,12 +238,12 @@ class CupertinoNavigationBar extends StatefulWidget implements ObstructingPrefer
        assert(
          heroTag != null,
          'heroTag cannot be null. Use transitionBetweenRoutes = false to '
-         'disable Hero transition on this navigation bar.'
+         'disable Hero transition on this navigation bar.',
        ),
        assert(
          !transitionBetweenRoutes || identical(heroTag, _defaultHeroTag),
          'Cannot specify a heroTag override if this navigation bar does not '
-         'transition due to transitionBetweenRoutes = false.'
+         'transition due to transitionBetweenRoutes = false.',
        ),
        super(key: key);
 
@@ -574,7 +574,7 @@ class CupertinoSliverNavigationBar extends StatefulWidget {
          automaticallyImplyTitle == true || largeTitle != null,
          'No largeTitle has been provided but automaticallyImplyTitle is also '
          'false. Either provide a largeTitle or set automaticallyImplyTitle to '
-         'true.'
+         'true.',
        ),
        super(key: key);
 

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

@@ -351,7 +351,7 @@ class CupertinoSliverRefreshControl extends StatefulWidget {
        assert(
          refreshTriggerPullDistance >= refreshIndicatorExtent,
          'The refresh indicator cannot take more space in its final state '
-         'than the amount initially created by overscrolling.'
+         'than the amount initially created by overscrolling.',
        ),
        super(key: key);
 

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

@@ -220,7 +220,7 @@ class CupertinoTabScaffold extends StatefulWidget {
        assert(
          controller == null || controller.index < tabBar.items.length,
          "The CupertinoTabController's current index ${controller.index} is "
-         'out of bounds for the tab bar with ${tabBar.items.length} tabs'
+         'out of bounds for the tab bar with ${tabBar.items.length} tabs',
        ),
        super(key: key);
 
@@ -367,7 +367,7 @@ class _CupertinoTabScaffoldState extends State<CupertinoTabScaffold> with Restor
     assert(
       _controller.index >= 0 && _controller.index < widget.tabBar.items.length,
       "The $runtimeType's current index ${_controller.index} is "
-      'out of bounds for the tab bar with ${widget.tabBar.items.length} tabs'
+      'out of bounds for the tab bar with ${widget.tabBar.items.length} tabs',
     );
 
     // The value of `_controller.index` has already been updated at this point.

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

@@ -811,8 +811,8 @@ class FlutterError extends Error with DiagnosticableTreeMixin implements Asserti
           'framework by filing a bug on GitHub:\n'
           '  https://github.com/flutter/flutter/issues/new?template=2_bug.md',
         ),
-      ],
-    ));
+      ]),
+    );
     assert(() {
       final Iterable<DiagnosticsNode> summaries = diagnostics.where((DiagnosticsNode node) => node.level == DiagnosticLevel.summary);
       if (summaries.length > 1) {

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

@@ -1436,7 +1436,7 @@ abstract class DiagnosticsNode {
          name == null || !name.endsWith(':'),
          'Names of diagnostic nodes must not end with colons.\n'
          'name:\n'
-         '  "$name"'
+         '  "$name"',
        );
 
   /// Diagnostics containing just a string `message` and not a concrete name or

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

@@ -194,7 +194,7 @@ class StackFrame {
       line != '===== asynchronous gap ===========================',
       'Got a stack frame from package:stack_trace, where a vm or web frame was expected. '
       'This can happen if FlutterError.demangleStackTrace was not set in an environment '
-      'that propagates non-standard stack traces to the framework, such as during tests.'
+      'that propagates non-standard stack traces to the framework, such as during tests.',
     );
 
     // Web frames.

packages/flutter/lib/src/gestures/force_press.dart

@@ -230,7 +230,7 @@ class ForcePressGestureRecognizer extends OneSequenceGestureRecognizer {
       final double pressure = interpolation(event.pressureMin, event.pressureMax, event.pressure);
       assert(
         (pressure >= 0.0 && pressure <= 1.0) || // Interpolated pressure must be between 1.0 and 0.0...
-        pressure.isNaN // and interpolation may return NaN for values it doesn't want to support...
+        pressure.isNaN, // and interpolation may return NaN for values it doesn't want to support...
       );
 
       _lastPosition = OffsetPair.fromEventPosition(event);

packages/flutter/lib/src/gestures/hit_test.dart

@@ -216,7 +216,7 @@ class HitTestResult {
       'events must be Vector4(0, 0, 1, 0) to ensure that a transformed '
       'point is directly under the pointing device. Did you forget to run the paint '
       'matrix through PointerEvent.removePerspectiveTransform? '
-      'The provided matrix is:\n$transform'
+      'The provided matrix is:\n$transform',
     );
     _localTransforms.add(_MatrixTransformPart(transform));
   }

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

@@ -45,7 +45,8 @@ class AppBarTheme with Diagnosticable {
     this.backwardsCompatibility,
   }) : assert(
          color == null || backgroundColor == null,
-         'The color and backgroundColor parameters mean the same thing. Only specify one.'),
+         'The color and backgroundColor parameters mean the same thing. Only specify one.',
+       ),
        backgroundColor = backgroundColor ?? color;
 
   /// This property is obsolete, please use [systemOverlayStyle] instead.
@@ -190,7 +191,8 @@ class AppBarTheme with Diagnosticable {
   }) {
     assert(
       color == null || backgroundColor == null,
-      'The color and backgroundColor parameters mean the same thing. Only specify one.');
+      'The color and backgroundColor parameters mean the same thing. Only specify one.',
+    );
     return AppBarTheme(
       brightness: brightness ?? this.brightness,
       backgroundColor: backgroundColor ?? color ?? this.backgroundColor,

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

@@ -290,7 +290,7 @@ class BottomNavigationBar extends StatefulWidget {
        assert(iconSize != null && iconSize >= 0.0),
        assert(
          selectedItemColor == null || fixedColor == null,
-         'Either selectedItemColor or fixedColor can be specified, but not both'
+         'Either selectedItemColor or fixedColor can be specified, but not both',
        ),
        assert(selectedFontSize != null && selectedFontSize >= 0.0),
        assert(unselectedFontSize != null && unselectedFontSize >= 0.0),

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

@@ -105,19 +105,19 @@ class CalendarDatePicker extends StatefulWidget {
        super(key: key) {
     assert(
       !this.lastDate.isBefore(this.firstDate),
-      'lastDate ${this.lastDate} must be on or after firstDate ${this.firstDate}.'
+      'lastDate ${this.lastDate} must be on or after firstDate ${this.firstDate}.',
     );
     assert(
       !this.initialDate.isBefore(this.firstDate),
-      'initialDate ${this.initialDate} must be on or after firstDate ${this.firstDate}.'
+      'initialDate ${this.initialDate} must be on or after firstDate ${this.firstDate}.',
     );
     assert(
       !this.initialDate.isAfter(this.lastDate),
-      'initialDate ${this.initialDate} must be on or before lastDate ${this.lastDate}.'
+      'initialDate ${this.initialDate} must be on or before lastDate ${this.lastDate}.',
     );
     assert(
       selectableDayPredicate == null || selectableDayPredicate!(this.initialDate),
-      'Provided initialDate ${this.initialDate} must satisfy provided selectableDayPredicate.'
+      'Provided initialDate ${this.initialDate} must satisfy provided selectableDayPredicate.',
     );
   }
 

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

@@ -2779,13 +2779,15 @@ class _RenderChip extends RenderBox {
     );
     size = constraints.constrain(paddedSize);
     assert(
-        size.height == constraints.constrainHeight(paddedSize.height),
-        "Constrained height ${size.height} doesn't match expected height "
-        '${constraints.constrainWidth(paddedSize.height)}');
+      size.height == constraints.constrainHeight(paddedSize.height),
+      "Constrained height ${size.height} doesn't match expected height "
+      '${constraints.constrainWidth(paddedSize.height)}',
+    );
     assert(
-        size.width == constraints.constrainWidth(paddedSize.width),
-        "Constrained width ${size.width} doesn't match expected width "
-        '${constraints.constrainWidth(paddedSize.width)}');
+      size.width == constraints.constrainWidth(paddedSize.width),
+      "Constrained width ${size.width} doesn't match expected width "
+      '${constraints.constrainWidth(paddedSize.width)}',
+    );
   }
 
   static final ColorTween selectionScrimTween = ColorTween(

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

@@ -223,19 +223,19 @@ Future<DateTime?> showDatePicker({
   lastDate = DateUtils.dateOnly(lastDate);
   assert(
     !lastDate.isBefore(firstDate),
-    'lastDate $lastDate must be on or after firstDate $firstDate.'
+    'lastDate $lastDate must be on or after firstDate $firstDate.',
   );
   assert(
     !initialDate.isBefore(firstDate),
-    'initialDate $initialDate must be on or after firstDate $firstDate.'
+    'initialDate $initialDate must be on or after firstDate $firstDate.',
   );
   assert(
     !initialDate.isAfter(lastDate),
-    'initialDate $initialDate must be on or before lastDate $lastDate.'
+    'initialDate $initialDate must be on or before lastDate $lastDate.',
   );
   assert(
     selectableDayPredicate == null || selectableDayPredicate(initialDate),
-    'Provided initialDate $initialDate must satisfy provided selectableDayPredicate.'
+    'Provided initialDate $initialDate must satisfy provided selectableDayPredicate.',
   );
   assert(initialEntryMode != null);
   assert(useRootNavigator != null);
@@ -324,19 +324,19 @@ class DatePickerDialog extends StatefulWidget {
        super(key: key) {
     assert(
       !this.lastDate.isBefore(this.firstDate),
-      'lastDate ${this.lastDate} must be on or after firstDate ${this.firstDate}.'
+      'lastDate ${this.lastDate} must be on or after firstDate ${this.firstDate}.',
     );
     assert(
       !this.initialDate.isBefore(this.firstDate),
-      'initialDate ${this.initialDate} must be on or after firstDate ${this.firstDate}.'
+      'initialDate ${this.initialDate} must be on or after firstDate ${this.firstDate}.',
     );
     assert(
       !this.initialDate.isAfter(this.lastDate),
-      'initialDate ${this.initialDate} must be on or before lastDate ${this.lastDate}.'
+      'initialDate ${this.initialDate} must be on or before lastDate ${this.lastDate}.',
     );
     assert(
       selectableDayPredicate == null || selectableDayPredicate!(this.initialDate),
-      'Provided initialDate ${this.initialDate} must satisfy provided selectableDayPredicate'
+      'Provided initialDate ${this.initialDate} must satisfy provided selectableDayPredicate',
     );
   }
 
@@ -1052,11 +1052,11 @@ Future<DateTimeRange?> showDateRangePicker({
   assert(context != null);
   assert(
     initialDateRange == null || (initialDateRange.start != null && initialDateRange.end != null),
-    'initialDateRange must be null or have non-null start and end dates.'
+    'initialDateRange must be null or have non-null start and end dates.',
   );
   assert(
     initialDateRange == null || !initialDateRange.start.isAfter(initialDateRange.end),
-    'initialDateRange\'s start date must not be after it\'s end date.'
+    'initialDateRange\'s start date must not be after it\'s end date.',
   );
   initialDateRange = initialDateRange == null ? null : DateUtils.datesOnly(initialDateRange);
   assert(firstDate != null);
@@ -1065,23 +1065,23 @@ Future<DateTimeRange?> showDateRangePicker({
   lastDate = DateUtils.dateOnly(lastDate);
   assert(
     !lastDate.isBefore(firstDate),
-    'lastDate $lastDate must be on or after firstDate $firstDate.'
+    'lastDate $lastDate must be on or after firstDate $firstDate.',
   );
   assert(
     initialDateRange == null || !initialDateRange.start.isBefore(firstDate),
-    'initialDateRange\'s start date must be on or after firstDate $firstDate.'
+    'initialDateRange\'s start date must be on or after firstDate $firstDate.',
   );
   assert(
     initialDateRange == null || !initialDateRange.end.isBefore(firstDate),
-    'initialDateRange\'s end date must be on or after firstDate $firstDate.'
+    'initialDateRange\'s end date must be on or after firstDate $firstDate.',
   );
   assert(
     initialDateRange == null || !initialDateRange.start.isAfter(lastDate),
-    'initialDateRange\'s start date must be on or before lastDate $lastDate.'
+    'initialDateRange\'s start date must be on or before lastDate $lastDate.',
   );
   assert(
     initialDateRange == null || !initialDateRange.end.isAfter(lastDate),
-    'initialDateRange\'s end date must be on or before lastDate $lastDate.'
+    'initialDateRange\'s end date must be on or before lastDate $lastDate.',
   );
   currentDate = DateUtils.dateOnly(currentDate ?? DateTime.now());
   assert(initialEntryMode != null);
@@ -1703,11 +1703,11 @@ class _CalendarDateRangePicker extends StatefulWidget {
        super(key: key) {
     assert(
       this.initialStartDate == null || this.initialEndDate == null || !this.initialStartDate!.isAfter(initialEndDate!),
-      'initialStartDate must be on or before initialEndDate.'
+      'initialStartDate must be on or before initialEndDate.',
     );
     assert(
       !this.lastDate.isBefore(this.firstDate),
-      'firstDate must be on or before lastDate.'
+      'firstDate must be on or before lastDate.',
     );
   }
 

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

@@ -1530,7 +1530,7 @@ class DropdownButtonFormField<T> extends FormField<T> {
        assert(
          autovalidate == false ||
          autovalidate == true && autovalidateMode == null,
-         'autovalidate and autovalidateMode should not be used together.'
+         'autovalidate and autovalidateMode should not be used together.',
        ),
        decoration = decoration ?? InputDecoration(focusColor: focusColor),
        super(

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

@@ -475,7 +475,7 @@ class _ExpansionPanelListState extends State<ExpansionPanelList> {
   Widget build(BuildContext context) {
     assert(kElevationToShadow.containsKey(widget.elevation),
       'Invalid value for elevation. See the kElevationToShadow constant for'
-      ' possible elevation values.'
+      ' possible elevation values.',
     );
 
     final List<MergeableMaterialItem> items = <MergeableMaterialItem>[];

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

@@ -136,7 +136,7 @@ class Ink extends StatefulWidget {
        assert(decoration == null || decoration.debugAssertIsValid()),
        assert(color == null || decoration == null,
          'Cannot provide both a color and a decoration\n'
-         'The color argument is just a shorthand for "decoration: BoxDecoration(color: color)".'
+         'The color argument is just a shorthand for "decoration: BoxDecoration(color: color)".',
        ),
        decoration = decoration ?? (color != null ? BoxDecoration(color: color) : null),
        super(key: key);

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

@@ -66,19 +66,19 @@ class InputDatePickerFormField extends StatefulWidget {
        super(key: key) {
     assert(
       !this.lastDate.isBefore(this.firstDate),
-      'lastDate ${this.lastDate} must be on or after firstDate ${this.firstDate}.'
+      'lastDate ${this.lastDate} must be on or after firstDate ${this.firstDate}.',
     );
     assert(
       initialDate == null || !this.initialDate!.isBefore(this.firstDate),
-      'initialDate ${this.initialDate} must be on or after firstDate ${this.firstDate}.'
+      'initialDate ${this.initialDate} must be on or after firstDate ${this.firstDate}.',
     );
     assert(
       initialDate == null || !this.initialDate!.isAfter(this.lastDate),
-      'initialDate ${this.initialDate} must be on or before lastDate ${this.lastDate}.'
+      'initialDate ${this.initialDate} must be on or before lastDate ${this.lastDate}.',
     );
     assert(
       selectableDayPredicate == null || initialDate == null || selectableDayPredicate!(this.initialDate!),
-      'Provided initialDate ${this.initialDate} must satisfy provided selectableDayPredicate.'
+      'Provided initialDate ${this.initialDate} must satisfy provided selectableDayPredicate.',
     );
   }
 

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

@@ -1722,13 +1722,13 @@ class _RenderListTile extends RenderBox {
       tileWidth != leadingSize.width || tileWidth == 0.0,
       'Leading widget consumes entire tile width. Please use a sized widget, '
       'or consider replacing ListTile with a custom widget '
-      '(see https://api.flutter.dev/flutter/material/ListTile-class.html#material.ListTile.4)'
+      '(see https://api.flutter.dev/flutter/material/ListTile-class.html#material.ListTile.4)',
     );
     assert(
       tileWidth != trailingSize.width || tileWidth == 0.0,
       'Trailing widget consumes entire tile width. Please use a sized widget, '
       'or consider replacing ListTile with a custom widget '
-      '(see https://api.flutter.dev/flutter/material/ListTile-class.html#material.ListTile.4)'
+      '(see https://api.flutter.dev/flutter/material/ListTile-class.html#material.ListTile.4)',
     );
 
     final double titleStart = hasLeading

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

@@ -363,7 +363,7 @@ class _MaterialState extends State<Material> with TickerProviderStateMixin {
       'If Material type is not MaterialType.transparency, a color must '
       'either be passed in through the `color` property, or be defined '
       'in the theme (ex. canvasColor != null if type is set to '
-      'MaterialType.canvas)'
+      'MaterialType.canvas)',
     );
     Widget? contents = widget.child;
     if (contents != null) {

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

@@ -3059,7 +3059,7 @@ class ScaffoldState extends State<Scaffold> with TickerProviderStateMixin, Resto
     assert(
       _snackBars.isEmpty || _messengerSnackBar == null,
       'Only one API should be used to manage SnackBars. The ScaffoldMessenger is '
-      'the preferred API instead of the Scaffold methods.'
+      'the preferred API instead of the Scaffold methods.',
     );
 
     if (_currentBottomSheet != null || _dismissedBottomSheets.isNotEmpty) {

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

@@ -207,7 +207,7 @@ class TextFormField extends FormField<String> {
        assert(
          autovalidate == false ||
          autovalidate == true && autovalidateMode == null,
-         'autovalidate and autovalidateMode should not be used together.'
+         'autovalidate and autovalidateMode should not be used together.',
        ),
        assert(maxLengthEnforced != null),
        assert(

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

@@ -180,7 +180,9 @@ class TextTheme with Diagnosticable {
           bodyText1 == null && bodyText2 == null) ||
          (display4 == null && display3 == null && display2 == null && display1 == null && headline == null && title == null &&
           subhead == null && subtitle == null &&
-          body2 == null && body1 == null), 'Cannot mix 2014 and 2018 terms in call to TextTheme() constructor.'),
+          body2 == null && body1 == null),
+         'Cannot mix 2014 and 2018 terms in call to TextTheme() constructor.',
+       ),
        headline1 = headline1 ?? display4,
        headline2 = headline2 ?? display3,
        headline3 = headline3 ?? display2,
@@ -451,7 +453,9 @@ class TextTheme with Diagnosticable {
        bodyText1 == null && bodyText2 == null) ||
       (display4 == null && display3 == null && display2 == null && display1 == null && headline == null && title == null &&
        subhead == null && subtitle == null &&
-       body2 == null && body1 == null), 'Cannot mix 2014 and 2018 terms in call to TextTheme.copyWith().');
+       body2 == null && body1 == null),
+      'Cannot mix 2014 and 2018 terms in call to TextTheme.copyWith().',
+    );
     return TextTheme(
       headline1: headline1 ?? display4 ?? this.headline1,
       headline2: headline2 ?? display3 ?? this.headline2,

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

@@ -617,13 +617,13 @@ class ToggleButtons extends StatelessWidget {
       !isSelected.any((bool val) => val == null),
       'All elements of isSelected must be non-null.\n'
       'The current list of isSelected values is as follows:\n'
-      '$isSelected'
+      '$isSelected',
     );
     assert(
       focusNodes == null || !focusNodes!.any((FocusNode val) => val == null),
       'All elements of focusNodes must be non-null.\n'
       'The current list of focus node values is as follows:\n'
-      '$focusNodes'
+      '$focusNodes',
     );
     assert(
       () {
@@ -633,7 +633,7 @@ class ToggleButtons extends StatelessWidget {
       }(),
       'focusNodes.length must match children.length.\n'
       'There are ${focusNodes!.length} focus nodes, while '
-      'there are ${children.length} children.'
+      'there are ${children.length} children.',
     );
     final ThemeData theme = Theme.of(context);
     final ToggleButtonsThemeData toggleButtonsTheme = ToggleButtonsTheme.of(context);

packages/flutter/lib/src/painting/box_decoration.dart

@@ -99,7 +99,7 @@ class BoxDecoration extends Decoration {
        assert(
          backgroundBlendMode == null || color != null || gradient != null,
          "backgroundBlendMode applies to BoxDecoration's background color or "
-         'gradient, but no color or gradient was provided.'
+         'gradient, but no color or gradient was provided.',
        );
 
   /// Creates a copy of this object but with the given fields replaced with the

packages/flutter/lib/src/painting/decoration_image.dart

@@ -440,7 +440,7 @@ void paintImage({
     image.debugGetOpenHandleStackTraces()?.isNotEmpty ?? true,
     'Cannot paint an image that is disposed.\n'
     'The caller of paintImage is expected to wait to dispose the image until '
-    'after painting has completed.'
+    'after painting has completed.',
   );
   if (rect.isEmpty)
     return;

packages/flutter/lib/src/painting/image_provider.dart

@@ -764,7 +764,7 @@ class ResizeImage extends ImageProvider<_SizeAwareCacheKey> {
       assert(
         cacheWidth == null && cacheHeight == null && allowUpscaling == null,
         'ResizeImage cannot be composed with another ImageProvider that applies '
-        'cacheWidth, cacheHeight, or allowUpscaling.'
+        'cacheWidth, cacheHeight, or allowUpscaling.',
       );
       return decode(bytes, cacheWidth: width, cacheHeight: height, allowUpscaling: this.allowUpscaling);
     }

packages/flutter/lib/src/rendering/box.dart

@@ -1940,7 +1940,7 @@ abstract class RenderBox extends RenderObject {
             'otherwise, the only object that is allowed to read RenderBox.size '
             'is its parent, if they have said they will. It you hit this assert '
             'trying to access a child\'s size, pass "parentUsesSize: true" to '
-            'that child\'s layout().'
+            'that child\'s layout().',
           );
         }
         assert(_size == this._size);

packages/flutter/lib/src/rendering/flex.dart

@@ -521,7 +521,7 @@ class RenderFlex extends RenderBox with ContainerRenderObjectMixin<RenderBox, Fl
       // on [RenderBox.computeMinIntrinsicWidth].
       assert(
         RenderObject.debugCheckingIntrinsics,
-        'Intrinsics are not available for CrossAxisAlignment.baseline.'
+        'Intrinsics are not available for CrossAxisAlignment.baseline.',
       );
       return 0.0;
     }

packages/flutter/lib/src/semantics/semantics.dart

@@ -1885,7 +1885,7 @@ class SemanticsNode extends AbstractNode with DiagnosticableTreeMixin {
 
     assert(
       config.platformViewId == null || childrenInInversePaintOrder == null || childrenInInversePaintOrder.isEmpty,
-      'SemanticsNodes with children must not specify a platformViewId.'
+      'SemanticsNodes with children must not specify a platformViewId.',
     );
 
     _label = config.label;

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

@@ -857,7 +857,7 @@ class Actions extends StatefulWidget {
       'The type passed to "find" resolved to "Intent": either a non-Intent '
       'generic type argument or an example intent derived from Intent must be '
       'specified. Intent may be used as the generic type as long as the optional '
-      '"intent" argument is passed.'
+      '"intent" argument is passed.',
     );
 
     _visitActionsAncestors(context, (InheritedElement element) {

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

@@ -205,13 +205,13 @@ class WidgetsApp extends StatefulWidget {
          home == null ||
          onGenerateInitialRoutes == null,
          'If onGenerateInitialRoutes is specified, the home argument will be '
-         'redundant.'
+         'redundant.',
        ),
        assert(
          home == null ||
          !routes.containsKey(Navigator.defaultRouteName),
          'If the home property is specified, the routes table '
-         'cannot include an entry for "/", since it would be redundant.'
+         'cannot include an entry for "/", since it would be redundant.',
        ),
        assert(
          builder != null ||
@@ -225,7 +225,7 @@ class WidgetsApp extends StatefulWidget {
          'or there must be an onUnknownRoute callback specified, '
          'or the builder property must be specified, '
          'because otherwise there is nothing to fall back on if the '
-         'app is started with an intent that specifies an unknown route.'
+         'app is started with an intent that specifies an unknown route.',
        ),
        assert(
          (home != null ||
@@ -243,7 +243,7 @@ class WidgetsApp extends StatefulWidget {
          'and the other navigator-related properties, '
          'navigatorKey, initialRoute, and navigatorObservers, '
          'must have their initial values '
-         '(null, null, and the empty list, respectively).'
+         '(null, null, and the empty list, respectively).',
        ),
        assert(
          builder != null ||
@@ -251,7 +251,7 @@ class WidgetsApp extends StatefulWidget {
          pageRouteBuilder != null,
          'If neither builder nor onGenerateRoute are provided, the '
          'pageRouteBuilder must be specified so that the default handler '
-         'will know what kind of PageRoute transition to build.'
+         'will know what kind of PageRoute transition to build.',
        ),
        assert(title != null),
        assert(color != null),
@@ -298,7 +298,7 @@ class WidgetsApp extends StatefulWidget {
   }) : assert(
          routeInformationParser != null &&
          routerDelegate != null,
-         'The routeInformationParser and routerDelegate cannot be null.'
+         'The routeInformationParser and routerDelegate cannot be null.',
        ),
        assert(title != null),
        assert(color != null),

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

@@ -5990,7 +5990,7 @@ class RawImage extends LeafRenderObjectWidget {
     assert(
       image?.debugGetOpenHandleStackTraces()?.isNotEmpty ?? true,
       'Creator of a RawImage disposed of the image when the RawImage still '
-      'needed it.'
+      'needed it.',
     );
     return RenderImage(
       image: image?.clone(),
@@ -6017,7 +6017,7 @@ class RawImage extends LeafRenderObjectWidget {
     assert(
       image?.debugGetOpenHandleStackTraces()?.isNotEmpty ?? true,
       'Creator of a RawImage disposed of the image when the RawImage still '
-      'needed it.'
+      'needed it.',
     );
     renderObject
       ..image = image?.clone()

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

@@ -273,7 +273,7 @@ class Container extends StatelessWidget {
        assert(decoration != null || clipBehavior == Clip.none),
        assert(color == null || decoration == null,
          'Cannot provide both a color and a decoration\n'
-         'To provide both, use "decoration: BoxDecoration(color: color)".'
+         'To provide both, use "decoration: BoxDecoration(color: color)".',
        ),
        constraints =
         (width != null || height != null)

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

@@ -729,10 +729,11 @@ class FocusNode with DiagnosticableTreeMixin, ChangeNotifier {
   /// Offset is the offset of the transformed widget in global coordinates.
   Offset get offset {
     assert(
-        context != null,
-        "Tried to get the offset of a focus node that didn't have its context set yet.\n"
-        'The context needs to be set before trying to evaluate traversal policies. '
-        'Setting the context is typically done with the attach method.');
+      context != null,
+      "Tried to get the offset of a focus node that didn't have its context set yet.\n"
+      'The context needs to be set before trying to evaluate traversal policies. '
+      'Setting the context is typically done with the attach method.',
+    );
     final RenderObject object = context!.findRenderObject()!;
     return MatrixUtils.transformPoint(object.getTransformTo(null), object.semanticBounds.topLeft);
   }
@@ -743,10 +744,11 @@ class FocusNode with DiagnosticableTreeMixin, ChangeNotifier {
   /// Rect is the rectangle of the transformed widget in global coordinates.
   Rect get rect {
     assert(
-        context != null,
-        "Tried to get the bounds of a focus node that didn't have its context set yet.\n"
-        'The context needs to be set before trying to evaluate traversal policies. '
-        'Setting the context is typically done with the attach method.');
+      context != null,
+      "Tried to get the bounds of a focus node that didn't have its context set yet.\n"
+      'The context needs to be set before trying to evaluate traversal policies. '
+      'Setting the context is typically done with the attach method.',
+    );
     final RenderObject object = context!.findRenderObject()!;
     final Offset topLeft = MatrixUtils.transformPoint(object.getTransformTo(null), object.semanticBounds.topLeft);
     final Offset bottomRight = MatrixUtils.transformPoint(object.getTransformTo(null), object.semanticBounds.bottomRight);

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

@@ -352,7 +352,7 @@ abstract class FocusTraversalPolicy with Diagnosticable {
     assert(
       sortedDescendants.length <= scope.traversalDescendants.length && sortedDescendants.toSet().difference(scope.traversalDescendants.toSet()).isEmpty,
       'Sorted descendants contains different nodes than FocusScopeNode.traversalDescendants would. '
-      'These are the different nodes: ${sortedDescendants.toSet().difference(scope.traversalDescendants.toSet())}'
+      'These are the different nodes: ${sortedDescendants.toSet().difference(scope.traversalDescendants.toSet())}',
     );
     return sortedDescendants;
   }
@@ -1161,9 +1161,10 @@ abstract class FocusOrder with Diagnosticable implements Comparable<FocusOrder>
   @nonVirtual
   int compareTo(FocusOrder other) {
     assert(
-        runtimeType == other.runtimeType,
-        "The sorting algorithm must not compare incomparable keys, since they don't "
-        'know how to order themselves relative to each other. Comparing $this with $other');
+      runtimeType == other.runtimeType,
+      "The sorting algorithm must not compare incomparable keys, since they don't "
+      'know how to order themselves relative to each other. Comparing $this with $other',
+    );
     return doCompare(other);
   }
 

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

@@ -90,7 +90,7 @@ class Form extends StatefulWidget {
        assert(
          autovalidate == false ||
          autovalidate == true && autovalidateMode == null,
-         'autovalidate and autovalidateMode should not be used together.'
+         'autovalidate and autovalidateMode should not be used together.',
        ),
        autovalidateMode = autovalidateMode ??
          (autovalidate ? AutovalidateMode.always : AutovalidateMode.disabled),
@@ -335,7 +335,7 @@ class FormField<T> extends StatefulWidget {
        assert(
          autovalidate == false ||
          autovalidate == true && autovalidateMode == null,
-         'autovalidate and autovalidateMode should not be used together.'
+         'autovalidate and autovalidateMode should not be used together.',
        ),
         autovalidateMode = autovalidateMode ??
           (autovalidate ? AutovalidateMode.always : AutovalidateMode.disabled),

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

@@ -437,7 +437,7 @@ class _HeroState extends State<Hero> {
   Widget build(BuildContext context) {
     assert(
       context.findAncestorWidgetOfExactType<Hero>() == null,
-      'A Hero widget cannot be the descendant of another Hero widget.'
+      'A Hero widget cannot be the descendant of another Hero widget.',
     );
 
     final bool showPlaceholder = _placeholderSize != null;

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

@@ -646,7 +646,7 @@ class AnimatedContainer extends ImplicitlyAnimatedWidget {
        assert(constraints == null || constraints.debugAssertIsValid()),
        assert(color == null || decoration == null,
          'Cannot provide both a color and a decoration\n'
-         'The color argument is just a shorthand for "decoration: BoxDecoration(color: color)".'
+         'The color argument is just a shorthand for "decoration: BoxDecoration(color: color)".',
        ),
        decoration = decoration ?? (color != null ? BoxDecoration(color: color) : null),
        constraints =

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

@@ -372,7 +372,7 @@ class _FixedExtentScrollPosition extends ScrollPositionWithSingleContext impleme
     String? debugLabel,
   }) : assert(
          context is _FixedExtentScrollableState,
-         'FixedExtentScrollController can only be used with ListWheelScrollViews'
+         'FixedExtentScrollController can only be used with ListWheelScrollViews',
        ),
        super(
          physics: physics,
@@ -480,7 +480,7 @@ class FixedExtentScrollPhysics extends ScrollPhysics {
     assert(
       position is _FixedExtentScrollPosition,
       'FixedExtentScrollPhysics can only be used with Scrollables that uses '
-      'the FixedExtentScrollController'
+      'the FixedExtentScrollController',
     );
 
     final _FixedExtentScrollPosition metrics = position as _FixedExtentScrollPosition;

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

@@ -878,7 +878,7 @@ abstract class TransitionDelegate<T> {
         indexOfNextRouteInNewHistory == newPageRouteHistory.length &&
         exitingPageRoutes.isEmpty,
         'The merged result from the $runtimeType.resolve does not include all '
-        'required routes. Do you remember to merge all exiting routes?'
+        'required routes. Do you remember to merge all exiting routes?',
       );
       return true;
     }());
@@ -2941,7 +2941,7 @@ class _RouteEntry extends RouteTransitionRecord {
            initialState == _RouteLifecycle.add ||
            initialState == _RouteLifecycle.push ||
            initialState == _RouteLifecycle.pushReplace ||
-           initialState == _RouteLifecycle.replace
+           initialState == _RouteLifecycle.replace,
          ),
          currentState = initialState;
 
@@ -3095,7 +3095,7 @@ class _RouteEntry extends RouteTransitionRecord {
     assert(
       !hasPage || isWaitingForExitingDecision,
       'A page-based route cannot be completed using imperative api, provide a '
-      'new list without the corresponding Page to Navigator.pages instead. '
+      'new list without the corresponding Page to Navigator.pages instead. ',
     );
     if (currentState.index >= _RouteLifecycle.remove.index)
       return;
@@ -3109,7 +3109,7 @@ class _RouteEntry extends RouteTransitionRecord {
     assert(
       !hasPage || isWaitingForExitingDecision,
       'A page-based route cannot be completed using imperative api, provide a '
-      'new list without the corresponding Page to Navigator.pages instead. '
+      'new list without the corresponding Page to Navigator.pages instead. ',
     );
     if (currentState.index >= _RouteLifecycle.remove.index)
       return;
@@ -3214,7 +3214,7 @@ class _RouteEntry extends RouteTransitionRecord {
     assert(
       isWaitingForEnteringDecision && !isWaitingForExitingDecision,
       'This route cannot be marked for push. Either a decision has already been '
-      'made or it does not require an explicit decision on how to transition in.'
+      'made or it does not require an explicit decision on how to transition in.',
     );
     currentState = _RouteLifecycle.push;
   }
@@ -3224,7 +3224,7 @@ class _RouteEntry extends RouteTransitionRecord {
     assert(
       isWaitingForEnteringDecision && !isWaitingForExitingDecision,
       'This route cannot be marked for add. Either a decision has already been '
-      'made or it does not require an explicit decision on how to transition in.'
+      'made or it does not require an explicit decision on how to transition in.',
     );
     currentState = _RouteLifecycle.add;
   }
@@ -3234,7 +3234,7 @@ class _RouteEntry extends RouteTransitionRecord {
     assert(
       !isWaitingForEnteringDecision && isWaitingForExitingDecision && isPresent,
       'This route cannot be marked for pop. Either a decision has already been '
-      'made or it does not require an explicit decision on how to transition out.'
+      'made or it does not require an explicit decision on how to transition out.',
     );
     pop<dynamic>(result);
     _isWaitingForExitingDecision = false;
@@ -3246,7 +3246,7 @@ class _RouteEntry extends RouteTransitionRecord {
       !isWaitingForEnteringDecision && isWaitingForExitingDecision && isPresent,
       'This route cannot be marked for complete. Either a decision has already '
       'been made or it does not require an explicit decision on how to transition '
-      'out.'
+      'out.',
     );
     complete<dynamic>(result);
     _isWaitingForExitingDecision = false;
@@ -3258,7 +3258,7 @@ class _RouteEntry extends RouteTransitionRecord {
       !isWaitingForEnteringDecision && isWaitingForExitingDecision && isPresent,
       'This route cannot be marked for remove. Either a decision has already '
       'been made or it does not require an explicit decision on how to transition '
-      'out.'
+      'out.',
     );
     remove();
     _isWaitingForExitingDecision = false;
@@ -3422,7 +3422,7 @@ class NavigatorState extends State<Navigator> with TickerProviderStateMixin, Res
       assert(
         entry.route.settings == page,
         'The settings getter of a page-based Route must return a Page object. '
-        'Please set the settings to the Page in the Page.createRoute method.'
+        'Please set the settings to the Page in the Page.createRoute method.',
       );
       _history.add(entry);
       _history.addAll(_serializableHistory.restoreEntriesForPage(entry, this));
@@ -3768,7 +3768,7 @@ class NavigatorState extends State<Navigator> with TickerProviderStateMixin, Res
       oldEntriesBottomToScan += 1;
       assert(
         oldEntry != null &&
-        oldEntry.currentState != _RouteLifecycle.disposed
+        oldEntry.currentState != _RouteLifecycle.disposed,
       );
       // Pageless routes will be recorded when we update the middle of the old
       // list.
@@ -3805,7 +3805,7 @@ class NavigatorState extends State<Navigator> with TickerProviderStateMixin, Res
         assert(
           newEntry.route.settings == nextPage,
           'The settings getter of a page-based Route must return a Page object. '
-          'Please set the settings to the Page in the Page.createRoute method.'
+          'Please set the settings to the Page in the Page.createRoute method.',
         );
         newHistory.add(newEntry);
       } else {

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

@@ -364,11 +364,11 @@ class OverlayState extends State<Overlay> with TickerProviderStateMixin {
     assert(_debugVerifyInsertPosition(above, below));
     assert(
       entries.every((OverlayEntry entry) => !_entries.contains(entry)),
-      'One or more of the specified entries are already present in the Overlay.'
+      'One or more of the specified entries are already present in the Overlay.',
     );
     assert(
       entries.every((OverlayEntry entry) => entry._overlay == null),
-      'One or more of the specified entries are already present in another Overlay.'
+      'One or more of the specified entries are already present in another Overlay.',
     );
     if (entries.isEmpty)
       return;
@@ -419,11 +419,11 @@ class OverlayState extends State<Overlay> with TickerProviderStateMixin {
     assert(_debugVerifyInsertPosition(above, below, newEntries: newEntriesList));
     assert(
       newEntriesList.every((OverlayEntry entry) => entry._overlay == null || entry._overlay == this),
-      'One or more of the specified entries are already present in another Overlay.'
+      'One or more of the specified entries are already present in another Overlay.',
     );
     assert(
       newEntriesList.every((OverlayEntry entry) => _entries.indexOf(entry) == _entries.lastIndexOf(entry)),
-      'One or more of the specified entries are specified multiple times.'
+      'One or more of the specified entries are specified multiple times.',
     );
     if (newEntriesList.isEmpty)
       return;

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

@@ -842,7 +842,7 @@ mixin RestorationMixin<S extends StatefulWidget> on State<S> {
            'Property is already registered under ${property._restorationId}.',
     );
     assert(_debugDoingRestore || !_properties.keys.map((RestorableProperty<Object?> r) => r._restorationId).contains(restorationId),
-           '"$restorationId" is already registered to another property.'
+           '"$restorationId" is already registered to another property.',
     );
     final bool hasSerializedValue = bucket?.contains(restorationId) == true;
     final Object? initialValue = hasSerializedValue
@@ -863,7 +863,7 @@ mixin RestorationMixin<S extends StatefulWidget> on State<S> {
     assert(
       property._restorationId == restorationId &&
       property._owner == this &&
-      _properties.containsKey(property)
+      _properties.containsKey(property),
     );
 
     property.initWithValue(initialValue);

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

@@ -247,7 +247,7 @@ class Router<T> extends StatefulWidget {
           (routeInformationProvider == null) == (routeInformationParser == null),
           'Both routeInformationProvider and routeInformationParser must be provided '
           'if this router parses route information. Otherwise, they should both '
-          'be null.'
+          'be null.',
         ),
         assert(routerDelegate != null),
         super(key: key);

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

@@ -240,7 +240,7 @@ class ScrollDragController implements Drag {
        assert(details != null),
        assert(
          motionStartDistanceThreshold == null || motionStartDistanceThreshold > 0.0,
-         'motionStartDistanceThreshold must be a positive number or null'
+         'motionStartDistanceThreshold must be a positive number or null',
        ),
        _delegate = delegate,
        _lastDetails = details,

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

@@ -99,7 +99,7 @@ abstract class ScrollView extends StatelessWidget {
        assert(clipBehavior != null),
        assert(!(controller != null && primary == true),
            'Primary ScrollViews obtain their ScrollController via inheritance from a PrimaryScrollController widget. '
-           'You cannot both set primary to true and pass an explicit controller.'
+           'You cannot both set primary to true and pass an explicit controller.',
        ),
        assert(!shrinkWrap || center == null),
        assert(anchor != null),

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

@@ -232,7 +232,7 @@ class SingleChildScrollView extends StatelessWidget {
        assert(clipBehavior != null),
        assert(!(controller != null && primary == true),
           'Primary ScrollViews obtain their ScrollController via inheritance from a PrimaryScrollController widget. '
-          'You cannot both set primary to true and pass an explicit controller.'
+          'You cannot both set primary to true and pass an explicit controller.',
        ),
        primary = primary ?? controller == null && identical(scrollDirection, Axis.vertical),
        super(key: key);

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

@@ -722,7 +722,7 @@ class SliverChildListDelegate extends SliverChildDelegate {
     final Key? key = child.key != null? _SaltedValueKey(child.key!) : null;
     assert(
       child != null,
-      "The sliver's children must not contain null values, but a null value was found at index $index"
+      "The sliver's children must not contain null values, but a null value was found at index $index",
     );
     if (addRepaintBoundaries)
       child = RepaintBoundary(child: child);

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

@@ -70,7 +70,7 @@ class Visibility extends StatelessWidget {
        assert(maintainSize != null),
        assert(
          maintainState == true || maintainAnimation == false,
-         'Cannot maintain animations if the state is not also maintained.'
+         'Cannot maintain animations if the state is not also maintained.',
        ),
        assert(
          maintainAnimation == true || maintainSize == false,