anchor.diff:    ///       // ...rest of body...
     ///     ],
     ///   ),
  -  /// );
  +  /// )
     /// ```
     final List<Widget> actions;
   
  
positive.code:   /// For less common operations, consider using a [PopupMenuButton] as the
    /// last action.
    ///
    /// For example:
    ///
    /// ```dart
    /// return new Scaffold(
    ///   appBar: new AppBar(
    ///     title: new Text('Hello World'),
    ///     actions: <Widget>[
    ///       new IconButton(
    ///         icon: new Icon(Icons.shopping_cart),
    ///         tooltip: 'Open shopping cart',
    ///         onPressed: _openCart,
    ///       ),
    ///     ],
    ///   ),
    ///   body: _buildBody(),
    /// );
    /// ```
    final List<Widget> actions;
  
  
negative.code:   /// For less common operations, consider using a [PopupMenuButton] as the
    /// last action.
    ///
    /// ## Sample code
    ///
    /// ```dart
    /// new Scaffold(
    ///   body: new CustomScrollView(
    ///     primary: true,
    ///     slivers: <Widget>[
    ///       new SliverAppBar(
  