anchor.diff:  ///                 ),
   ///               ),
   ///             ),
  -///             TextField(
  +///             const TextField(
   ///               maxLines: 2,
   ///               decoration: InputDecoration(
   ///                 hintText: 'Up/down behave normally here.',
  
positive.code: ///     child: Center(
  ///       child: Shortcuts(
  ///         shortcuts: <LogicalKeySet, Intent>{
  ///           LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowDown): NextFocusIntent(),
  ///           LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.arrowUp): PreviousFocusIntent(),
  ///         },
  ///         child: Column(
  ///           children: <Widget>[
  ///             TextField(
  ///               decoration: InputDecoration(
  ///                 hintText: 'alt + down moves to the next field.',
  
negative.code: ///                     },
  ///                   ),
  ///                 },
  ///                 child: const TextField(
  ///                   maxLines: 2,
  ///                   decoration: InputDecoration(
  ///                     hintText: 'Up/down increment/decrement here.',
  