anchor.diff:        ..text = 'Dart + HTML'
         ..style.paddingLeft = '8px');
       _embedDartRadio.checked = true;
  -    _embedPicture = _rightArea.add(new ImageElement(src: _docThumbnail, height: 100, width: 300)
  +    _embedPicture = _rightArea.add(
  +        new ImageElement(src: _docThumbnail, height: 100, width: 300)
         ..alt = "Embed-dart"
         ..style.paddingLeft = "16px");
       _embedDartRadio.onClick.listen((_) => _embedToDart());
       _embedHtmlRadio.onClick.listen((_) => _embedToHtml());
  -    _info = _leftArea.add(new DElement.tag('div')..layoutHorizontal()..flex());
  +    _info = _leftArea.add(new DElement.tag('div')
  +      ..layoutHorizontal()
  +      ..flex());
       _info.add(new SpanElement()
         ..text = 'Check out our '
         ..style.fontSize = "12px"
         ..append(new SpanElement()
  -      ..text = 'embedding guide'
  -      ..attributes['onClick'] =
  -    "window.open('https://github.com/dart-lang/dart-pad/wiki/Embedding-Guide')"
  -      ..style.cursor = "pointer"
  -      ..style.textDecoration = "underline"
  -      ..style.fontSize = "12px")
  -      ..append(new SpanElement()
  -      ..text = '.'));
  +        ..text = 'embedding guide'
  +        ..attributes['onClick'] =
  +        "window.open('https://github.com/dart-lang/dart-pad/wiki/Embedding-Guide')"
  +        ..style.cursor = "pointer"
  +        ..style.textDecoration = "underline"
  +        ..style.fontSize = "12px")
  +      ..append(new SpanElement()..text = '.'));
     }
   
     void _embedToDart() {
       _embedPicture.src = _docThumbnail;
       _embedPicture.alt = "Embed-dart";
  -    _embedUrl.value = "<iframe src='https://${home}/embed-dart.html?id=${gistContainer.mutableGist.id}'></iframe>";
  +    _embedUrl.value =
  +        "<iframe src='https://${home}/embed-dart.html?id=${gistContainer.mutableGist.id}'></iframe>";
     }
   
     void _embedToHtml() {
       _embedPicture.src = _htmlThumbnail;
       _embedPicture.alt = "Embed-html";
  -    _embedUrl.value = "<iframe src='https://${home}/embed-html.html?id=${gistContainer.mutableGist.id}'></iframe>";
  +    _embedUrl.value =
  +        "<iframe src='https://${home}/embed-html.html?id=${gistContainer.mutableGist.id}'></iframe>";
     }
   
     void showWithSummary(String summary) {
  
positive.code:       ..readonly();
      _gistUrl.onClick.listen((_) => _gistUrl.selectAll());
      div = _div.add(new DElement.tag('div', classes: 'row')..layoutHorizontal());
      div.add(new DElement.tag('span', classes: 'sharinglabel'))
        ..text = 'Embed:';
      inputGroup = div.add(new DElement.tag('div'))
        ..layoutHorizontal()
        ..flex();
      _embedUrl = inputGroup.add(new DInput.input(type: 'text'))
        ..flex()
        ..readonly()
        ..value = "<iframe src='https://${home}/embed-dart.html?id=${gistContainer.mutableGist.id}'></iframe>";
      _embedUrl.onClick.listen((_) => _embedUrl.selectAll());
      div = _div.add(new DElement.tag('div', classes: 'row')
        ..layoutHorizontal());
      _embedArea = div.add(new DElement.tag('div'))
        ..layoutHorizontal()
        ..flex();
  
negative.code:       ..layoutVertical()
        ..flex());
      DElement _rightArea = _embedArea.add(new DElement.tag('div'));
      DElement _embedDartArea =
          _leftArea.add(new DElement.tag('div')..layoutHorizontal());
      DElement _embedHtmlArea =
          _leftArea.add(new DElement.tag('div')..layoutHorizontal());
      _embedDartRadio = _embedDartArea.add(new RadioButtonInputElement()
        ..name = "embed"
        ..id = "dart-radio");
  