anchor.diff:  <div class="tab-content">
     <div class="tab-pane active" id="documents_list">
       <% unless @documents.empty? %>
  -        <h2>Related documents</h2>
  -        <ul class="listings">
  -          <% @documents.roots.each do |d| %>
  -              <li class="listings-item">
  -                <% num_children = d.children.count %>
  -                <strong><%= link_to d.title, project_document_path(@project, d) %></strong> <%= "(#{num_children})" if num_children > 0 %>
  -                -
  -                <i>created by <%= d.user.display_name %> <%= time_ago_in_words(d.created_at) %> ago</i>
  -              </li>
  -          <% end %>
  -        </ul>
  +      <h2>Related documents</h2>
  +      <ul class="listings">
  +        <% @documents.roots.each do |d| %>
  +          <li class="listings-item">
  +            <% num_children = d.children.count %>
  +            <strong><%= link_to d.title, project_document_path(@project, d) %></strong> <%= "(#{num_children})" if num_children > 0 %>
  +            -
  +            <i>created by <%= d.user.display_name %> <%= time_ago_in_words(d.created_at) %> ago</i>
  +          </li>
  +        <% end %>
  +      </ul>
       <% else %>
  -        <p style="margin-top: 20px;">No documents can be found for project <strong><%= @project.title %></strong></p>
  +      <p style="margin-top: 20px;">No documents can be found for project <strong><%= @project.title %></strong></p>
       <% end %>
     </div>
     <div class="tab-pane" id="members_list">
       <ul class="listings">
         <% if @members.empty? %>
  -          <p style="margin-top: 20px;">No members in project <strong><%= @project.title %></strong></p>
  +        <p style="margin-top: 20px;">No members in project <strong><%= @project.title %></strong></p>
         <% else %>
  -          <h2>List of Project Members</h2>
  -          <% @members.each do |member| %>
  -              <li class="listings-item"><strong><%= link_to member.display_name, users_show_path(member) %></strong>
  -              </li>
  -          <% end %>
  +        <h2>List of Project Members</h2>
  +        <% @members.each do |member| %>
  +          <li class="listings-item"><strong><%= link_to member.display_name, users_show_path(member) %></strong>
  +          </li>
  +        <% end %>
         <% end %>
       </ul>
     </div>
  
positive.code:       <div class="col-md-6">
          <ul class="listings">
            <% if @videos.empty? %>
                <p style="margin-top: 20px;">No videos in project <strong><%= @project.title %></strong></p>
            <% else %>
                <h2>List of Project videos</h2>
                <% @videos.each do |video| %>
                    <li>
                      <%= video_link(video) %> - <i style="font-size: 85%; color: darkgray;">published: <%= video[:published] %></i>
                    </li>
                <% end %>
            <% end %>
          </ul>
        </div>
        <div class="col-md-6">
          <% unless @videos.empty? %>
              <h4 id="video_contents"><%= @videos.first[:content] %></h4>
              <iframe id="ytplayer" type="text/html" width="340" height="210"
                      src="<%= video_embed_link(@videos.first) %>" frameborder="0"></iframe>
              </div>
          <% end %>
          </div>
    </div>
  
negative.code: <%= javascript_include_tag '/javascripts/users', 'data-turbolinks-track' => true %>
  <div>
    <strong><%= link_to 'List of Projects', projects_path %></strong> <i class="fa fa-angle-double-right"></i>
    <strong><%= @project.title %></strong>
  