anchor.diff:    Widget build(BuildContext context) {
       final ThemeData themeData = Theme.of(context);
       final TextStyle aboutTextStyle = themeData.textTheme.body2;
  -    final TextStyle aboutLinkStyle = themeData.textTheme.body2.copyWith(color: themeData.accentColor);
  +    final TextStyle linkStyle = themeData.textTheme.body2.copyWith(color: themeData.accentColor);
   
       return new Drawer(
         child: new Block(
  
positive.code:                         "animations, layouts, and more. Learn more about Flutter at "
                        ),
                        new LinkTextSpan(
                          style: aboutLinkStyle,
                          url: 'https://flutter.io'
                        ),
                        new TextSpan(
  
negative.code:                         text: ".\n\nTo see the source code for this app, please visit the "
                        ),
                        new LinkTextSpan(
                          style: linkStyle,
                          url: 'https://goo.gl/iv1p4G',
                          text: 'flutter github repo'
                        ),
  