anchor.diff:                children: <TextSpan>[
                   new TextSpan(
                     style: aboutTextStyle,
  -                  text: 'Flutter is an early-stage, open-source project to help '
  -                        'developers build high-performance, high-fidelity, mobile '
  -                        'apps for iOS and Android from a single codebase. This '
  -                        "gallery is a preview of Flutter's many widgets, behaviors, "
  -                        'animations, layouts, and more. Learn more about Flutter at '
  +                  text: 'Flutter is an early-stage, open-source project to help developers'
  +                        'build high-performance, high-fidelity, mobile apps for '
  +                        '${defaultTargetPlatform == TargetPlatform.iOS ? 'multiple platforms' : 'iOS and Android'} '
  +                        'from a single codebase. This gallery is a preview of '
  +                        "Flutter's many widgets, behaviors, animations, layouts, "
  +                        'and more. Learn more about Flutter at '
                   ),
                   new LinkTextSpan(
                     style: linkStyle,
  
positive.code:     final Widget cupertinoItem = new RadioListTile<TargetPlatform>(
        // on iOS, we don't want to show the iPhone icon
        secondary: new Icon(defaultTargetPlatform == TargetPlatform.iOS ? Icons.star_border : Icons.phone_iphone),
        title: const Text('iOS'),
        value: TargetPlatform.iOS,
        groupValue: Theme.of(context).platform,
        onChanged: onPlatformChanged,
  
negative.code:     final Widget mountainViewItem = new RadioListTile<TargetPlatform>(
        // on iOS, we don't want to show an Android phone icon
        secondary: new Icon(defaultTargetPlatform == TargetPlatform.iOS ? Icons.star : Icons.phone_android),
        title: new Text(defaultTargetPlatform == TargetPlatform.iOS ? 'Mountain View' : 'Android'),
        value: TargetPlatform.android,
        groupValue: Theme.of(context).platform,
        onChanged: onPlatformChanged,
  