anchor.diff:      </section>
   
       <article id="module-content">
  +    <!--
         <div id="module-introduction-video-wrapper">
           <img src="http://placehold.it/640x360">
         </div>
  +    -->
   
       <div id="module-introduction-wrapper">   
          <aside id="toc">
  
positive.code:                <% end %>
               </h3>
             </div>
           <%= section.content.html_safe %>
         <% end %> 
         <% if can? :update, @udl_module %>
         <p>
           <%= link_to(
  
negative.code:                <% end %>
               </h3>
             </div>
             <div class="module-section-content-wrapper">
               <%= section.content.html_safe %>
             </div>
         <% end %>
         <% if can? :update, @udl_module %>
           <p>
  