anchor.diff:              </p>
             </div>
   
  -          <div class="col-md-3">
  -            <h5>内容许可</h5>
  -            <p>
  -              除特别说明外，用户内容均采用
  -              <a href="http://creativecommons.org/licenses/by-sa/3.0/cn/">
  -                知识共享署名-相同方式共享 3.0 中国大陆许可协议
  -              </a> 进行许可
  -            </p>
  -            <p>
  -              京ICP备12345678-1号
  -            </p>
  -          </div>
  -
           </div>
         </div>
       </footer>
  
positive.code: 
                <% unless login? %>
                <li>
                  <a href="javascript:void(0);" data-toggle="modal"
                     data-target="#login-modal">
                    <span class="glyphicon glyphicon-log-in" aria-hidden="true">
                    </span>
                    &nbsp;登录
  
negative.code:         </div> <!-- /.container-fluid -->
        </nav>
  
  
        <%= render_breadcrumb %>
  
  