anchor.diff:    @override
     Token get beginToken => leftBracket;
   
  -  /**
  -   * TODO(paulberry): Add commas.
  -   */
  -  @override
  +  @override
  +  // TODO(paulberry): Add commas.
     Iterable get childEntities => new ChildEntities()
       ..add(leftBracket)
       ..addAll(_arguments)
  
positive.code:     _shownNames = new NodeList<SimpleIdentifier>(this, shownNames);
    }
  
    /**
     * TODO(paulberry): add commas.
     */
    @override
    Iterable get childEntities => new ChildEntities()
      ..add(keyword)
      ..addAll(_shownNames);
  
negative.code:   Token get keyword => breakKeyword;
  
    /**
     * Set the token representing the 'break' keyword to the given [token].
     */
    @deprecated // Use "this.breakKeyword"
    void set keyword(Token token) {
  