Fix the the (#21732)

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

@@ -44,7 +44,7 @@ import 'framework.dart';
 /// The Android view's lifetime is the same as the lifetime of the [State] object for this widget.
 /// When the [State] is disposed the platform view (and auxiliary resources) are lazily
 /// released (some resources are immediately released and some by platform garbage collector).
-/// A stateful widget's state is disposed the the widget is removed from the tree or when it is
+/// A stateful widget's state is disposed when the widget is removed from the tree or when it is
 /// moved within the tree. If the stateful widget has a key and it's only moved relative to its siblings,
 /// or it has a [GlobalKey] and it's moved within the tree, it will not be disposed.
 class AndroidView extends StatefulWidget {

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

@@ -909,7 +909,7 @@ abstract class ModalRoute<T> extends TransitionRoute<T> with LocalHistoryRoute<T
   /// included in the semantics tree.
   ///
   /// If [semanticsDismissible] is false, then modal barrier semantics are
-  /// excluded from the the semantics tree and tapping on the modal barrier
+  /// excluded from the semantics tree and tapping on the modal barrier
   /// has no effect.
   bool get semanticsDismissible => true;