anchor.diff:        }
   
         h3 {
  -        float: left;
  +        float: right;
           font-style: italic;
           font-weight: normal;
           color: #555;
  
positive.code:       }
  
        footer {
          font-size: .85em;
          margin-left: 20em;
        }
  
        footer span {
  
negative.code:     <% if last_update %>
        <h3>Last updated: <%= last_update.strftime('%e %B %Y') %></h3>
      <% end %>
      </div>
  
      <div class="clearfix"></div>
  
  