anchor.diff:      <div id="nav">
         <div class="container-fluid">
           <div class="masthead">
  +
  +
             <ul class="nav nav-pills pull-right">
   
  -            <!-- <li class="">
  -              <a href="/">Home</a>
  -            </li> -->
  +            <li class="">
  +              <a href="/">浏览商品</a>
  +            </li>
   
               <% if user_signed_in? %>
               <li class="<%= show_nav_active('devise/sessions', 'new') %> dropdown">            
  
positive.code: 
          <div class="col-md-5">
  
            <div class="pull-right shopping-cart">
              
            </div>
            
          </div>
  
negative.code:       
  
            </ul>
  
            <h3 class="wordmark text-muted"><a href="/">Store</a></h3>
            
          </div>
        </div>
      </div>
  
      
  