anchor.diff:              </div>
             </div>
             <div class="large-9 columns">
  -            <div class="section-container horizontal-nav" data-section>
  +            <div class="section-container horizontal-nav" data-section="horizontal-nav">
                 <section class="section">
                   <p class="title"><a href="#">Section 1</a></p>
                   <div class="content">
  
positive.code: <%= code_example '
  <div class="row">
    <div class="large-3 columns">
      <div class="section-container vertical-nav" data-section>
        <section class="section">
          <p class="title"><a href="#">Section 1</a></p>
          <div class="content">
  
negative.code:   </section>
  </div>', :html %>
  
          <h6>Tabs</h6>
          <p>Adding a <code>tabs</code> class to the section container will enable tabs on both small and large screens.</p>
  <%= code_example '
  <div class="section-container tabs" data-section="tabs">
    <section class="section">
      <p class="title"><a href="#">Section 1</a></p>
      <div class="content">
  