anchor.diff:        ..layoutHorizontal());
       DElement _embedHtmlArea = _leftArea.add(new DElement.tag('div')
         ..layoutHorizontal());
  -    RadioButtonInputElement _embedDartRadio = _embedDartArea.add(new RadioButtonInputElement()
  -      ..name="embed"
  -      ..id="dart-radio");
  +    _embedDartRadio = _embedDartArea.add(new RadioButtonInputElement()
  +      ..name = "embed"
  +      ..id = "dart-radio");
       _embedDartArea.add(new LabelElement()
         ..htmlFor = 'dart-radio'
  -      ..text = 'Embedding with Documentation'
  +      ..text = 'Dart + documentation'
         ..style.paddingLeft = '8px');
  -    RadioButtonInputElement _embedHtmlRadio = _embedHtmlArea.add(new RadioButtonInputElement()
  -      ..name="embed"
  -      ..id="html-radio");
  +    _embedHtmlRadio = _embedHtmlArea.add(new RadioButtonInputElement()
  +      ..name = "embed"
  +      ..id = "html-radio");
       _embedHtmlArea.add(new LabelElement()
         ..htmlFor = 'html-radio'
  -      ..text = 'Embedding with HTML'
  +      ..text = 'Dart + HTML'
         ..style.paddingLeft = '8px');
       _embedDartRadio.checked = true;
       _embedPicture = _rightArea.add(new ImageElement(src: _docThumbnail, height: 100, width: 300)
  -      ..alt="Embed-dart"
  +      ..alt = "Embed-dart"
         ..style.paddingLeft = "16px");
       _embedDartRadio.onClick.listen((_) => _embedToDart());
       _embedHtmlRadio.onClick.listen((_) => _embedToHtml());
  
positive.code:       _text.text =
            'Share the DartPad link or view the source at gist.github.com.';
        _textArea.style.display = 'none';
  
        MutableGist gist = gistContainer.mutableGist;
  
        content.add(_div);
        _padUrl.value = 'https://dartpad.dartlang.org/${gist.id}';
        _gistUrl.value = gist.html_url;
        buttonArea.add(_cancelButton);
        buttonArea.add(new SpanElement()..attributes['flex'] = '');
      }
  
negative.code:   DButton _cancelButton;
    DButton _shareButton;
    DElement _div;
    DElement _embedArea;
    DElement _info;
    DInput _padUrl;
    DInput _gistUrl;
    DInput _embedUrl;
    String _summary;
  
    ImageElement _embedPicture;
  
    RadioButtonInputElement _embedDartRadio;
    RadioButtonInputElement _embedHtmlRadio;
  
    SharingDialog(
        GistContainer this.gistContainer, GistController this.gistController,
  