anchor.diff:        <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>
  +            <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 %>
  +            <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>
  +          <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>
  
positive.code:   </div>
    <div id="doc-side-panel">
      <% if user_signed_in? %>
          <ul>
            <li><%= custom_css_btn 'edit', 'fa fa-pencil-square-o', edit_project_path(@project) %></li>
            <li><%= custom_css_btn 'new document', 'fa fa-file-text-o', new_project_document_path(project_id: @project.friendly_id) %></li>
            <li>
              <% if current_user.following?(@project) %>
                  <%= custom_css_btn 'leave project', 'fa fa-users', unfollow_project_path(@project) %>
                <li>
                  <div id="HOA-placeholder"></div>
                </li>
  
                <script src="https://apis.google.com/js/platform.js"></script>
                <script>
                    gapi.hangout.render('HOA-placeholder', {
                        'topic': '<%= @project.title%> - Pairing session',
                        'render': 'createhangout',
                        'hangout_type': 'onair',
                        'initial_apps': [
                            {'app_type': 'ROOM_APP' }
                        ],
                    });
                </script>
            <% else %>
                <%= custom_css_btn 'join project', 'fa fa-users', follow_project_path(@project) %>
            <% end %>
            </li>
          </ul>
      <% 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>
  