anchor.diff:  class DartSnippet {
     final String name;
     final String description;
  +  final String shortDescription;
     final String mainLibrary;
     String mainElements;
     final String tags;
  
positive.code:   DartSnippet.fromJSON(this.id, Map json, this.users)
        : name = json['name'],
          description = json['description'],
          mainLibrary = json['mainLibrary'],
          mainElements = json['mainElements'],
          dependencies = json['dependencies'],
  
negative.code:     return new DivElement()
        ..setInnerHtml('''
        <div class="left">
      ${shortDescription}
      <b>Libraries:</b> <code><em>$mainLibrary</em></code> ${libString}<br>
      <b>Main element${mainElements.split(' ').length > 1 ? "s" : ""}:</b>
      ${mainElements}<br>
  