anchor.diff:    <body>
       <div class="wrapper"><!-- wrapper to make footer sticky to bottom -->
   
  -      <!-- navbar -->
         <nav class="navbar navbar-default">
           <div class="container-fluid">
             <div class="navbar-header">
  -            <button type="button" class="navbar-toggle collapsed"
  +            <button type="button"
  +                    class="navbar-toggle collapsed"
                       data-toggle="collapse"
                       data-target="#navbar-collapse-1"
                       aria-expanded="false">
  
positive.code:             <div class="head-logo-box">
                <a class="navbar-brand" href="/">
                  <img alt="韩非子说" src="/little-logo.png" class="logo" />
                  <span class="beta">Beta</span>
                </a>
              </div>
            </div>
  
negative.code: <!DOCTYPE html>
  <html lang="zh-CN">
    <head>
      <meta charset="utf-8" />
      <meta http-equiv="X-UA-Compatible" content="IE=edge" />
      <meta name="viewport" content="width=device-width, initial-scale=1" />
      <meta name="keywords" content="<%= @page_keywords_list %>,法律,法务,问答,社区" />
      <meta name="description" content="<%= @page_description %> 法律 法务 问答 社区" />
      <title>
        <% if @_title %><%= @_title %> | 韩非子说<% else %>韩非子说<% end %>
      </title>
      <link rel="icon" href="/favicon.ico" />
      <link rel="shortcut icon" href="/favicon.ico" />
      <link rel="bookmark" href="/favicon.ico" />
      <link rel="stylesheet" href="/css/bootstrap-with-theme.min.css" />
      <link rel="stylesheet" href="/css/my.css" />
      <%= yield_content :extra_css_tags %>
      <!--[if lt IE 9]>
        <script src="/js/html5shiv.min.js"></script>
  