anchor.diff:            a(id="advanced" href="#" class="action") Advanced
           li(style="display:none" id="otherFormats")
             h1 Other formats
  -          a(href="#" id="rss") RSS
             a(href="#" id="jsonp") JSONP
             a(href="#" id="html") HTML
             a(href="#" id="js") JavaScript
  
positive.code:           | Display Format:
            a(href="#" class="help" id="formatHelp") ?
            span
              input(id="abbreviated"type="radio" name="formatGroup" value="abbreviated" data-bind="checked: chosenFormat")/
              label(for="abbreviated") Abbreviated
              input(id="detailed" type="radio" name="formatGroup" value="detailed" data-bind="checked: chosenFormat")/
              label(for="detailed") Detailed
          li
            | Styling:
            a(href="#" class="help" id="styleHelp") ?
  
negative.code:       var viewModel = {
          chosenCollection: ko.observable(collections),
          chosenLimit: ko.observable(noItems),
          chosenFormat: ko.observable('detailed'),
          chosenStyle: ko.observable('yes'),
          latestUrl: ''
        };
  