anchor.diff:        body {
           margin: 0;
           background-color: #eee;
  -        font-family: 'Open Sans', sans-serif;
  +        font-family: 'Helvetica Neue', sans-serif;
         }
   
         h1 {
           margin-top: 0;
  +      }
  +
  +      section {
  +        border-top: 1px solid #ccc;
  +      }
  +
  +      section:last-of-type {
  +        border-bottom: 1px solid #ccc;
         }
   
         a {
  
positive.code: 
    <div class="container">
      <h1>
        <% group['prefix_pairs'].each do |prefix, combined| %>
        <a href="<%= combined.join('.') %>.html"><%= prefix %></a>
        <% end %>
      </h1>
  
      <h2><%= group['doc'] %></h2>
  
      <ul>
        <% group['subitems'].each do |item| %>
  
negative.code:       <% end %>
      </ul>
  
      <% end %>
  
    </div>
  