anchor.diff:  <!DOCTYPE html>
   <html>
   <head>
  -  <title>SimpleFormBootstrap</title>
  +  <title>Example application with SimpleForm and Twitter Bootstrap</title>
     <%= stylesheet_link_tag    "application" %>
     <%= csrf_meta_tags %>
   </head>
  
positive.code:               <b class='caret'></b>
              </a>
              <ul class="dropdown-menu">
                <li><%= link_to "List", articles_path %></li>
                <li><%= link_to "New Article", new_article_path %></li>
              </ul>
            </li>
          </ul>
  
negative.code:   <header class="navbar navbar-fixed">
      <div class="navbar-inner">
        <div class="container">
          <a class="brand" href="#">SimpleForm + Twitter Bootstrap</a>
          <ul class="nav">
            <li><%= link_to "Home", root_path %></li>
            <li class="dropdown">
  