anchor.diff:  
       <h2 id="regions">Regions</h2>
       <p>Regions are complete sections of an interface.</p>
  -
  -    <h4 id="banner">Banner</h4>
  -    <% styleguide_block  'Banner' do %>
  -      <header role="banner" class="$modifier_class">
  -        <div class="wrapper">
  -          <h1 class="__title">Title</h1>
  -          <p class="__subtitle">Subtitle.</p>
  -        </div>
  -      </header>
  -    <% end %>
   
       <h4 id="chrome">Chrome</h4>
       <% styleguide_block  'Site Chrome' do %>
  
positive.code:       </article>
      <% end %>
  
      <h4 id="media-select">Media Selector</h4>
      <% styleguide_block 'Media Selector' do %>
        <div class="js-media-options">
          <div class="form-item form-type-radio">
            <input type="radio" value="value1" name="item" id="option1" checked="checked">
            <label for="option1">
              <img alt="kitten overlords" src="http://placekitten.com/g/600/600">
            </label>
          </div>
  
          <div class="form-item form-type-radio">
            <input type="radio" value="value2" name="item" id="option2">
            <label for="option2">
              <img alt="kitten overlords" src="http://placekitten.com/g/600/600">
  
negative.code:     <% styleguide_block  'Tabbed Navigation' do %>
        <nav class="tabs $modifier_class">
          <ul>
            <li class="is-active"><a href="#">Section One</a></li>
            <li><a href="#">Section Two</a></li>
            <li><a href="#">Section Three</a></li>
          </ul>
  