anchor.diff:    <p class="col-md-6 lead">When adding an item include an <code>icon-plus</code> icon.</p>
     <div class="col-md-6">
       <a href="#" class="btn btn-default">
  -      <i class="glyphicon glyphicon-plus"></i> Add mapping
  +      <i class="glyphicon glyphicon-plus"></i> Add item
       </a>
     </div>
   </div>
  
positive.code: 
  <h2>No content</h2>
  <div class="row">
    <p class="col-md-6 lead">A large but light style which applies to the empty state, eg when there are no mappings or hits. The bordered version mimics bootstrap table styles.</p>
    <div class="col-md-6">
      <p class="no-content">No mappings available</p>
      <p class="no-content no-content-bordered">Bordered message</p>
      <p class="no-content">A longer, multi-line no content message. Do labore et <a href="<%= @normal_link_href %>">dolore magna aliqua</a>.</p>
    </div>
  
negative.code:     </div>
    </div>
    <div class="col-md-4">
      <div class="highlight highlight-turquoise add-bottom-margin">
        <p class="big-message">Turquoise</p>
      </div>
      <div class="highlight highlight-orange">
        <p class="big-message">Orange</p>
      </div>
    </div>
  </div>
  