anchor.diff:      <%= timeslot_with_location_tr("10:15&nbsp;&#8209;&nbsp;11:00", @periods_by_time_and_scene[0]) %>
       <%= timeslot_talks_tr(@periods_by_time_and_scene[0]) %>
       <!-- Lightning talks -->
  -    <%= timeslot_tr("11:15&nbsp;&#8209;&nbsp;12:00", @periods_by_time_and_scene[1]) %>
  +    <%= timeslot_with_location_tr("11:15&nbsp;&#8209;&nbsp;12:00", @periods_by_time_and_scene[1]) %>
       <%= timeslot_talks_tr(@periods_by_time_and_scene[1]) %>
       <tr>
         <td class="time">12:00&nbsp;&#8209;&nbsp;13:00</td> 
  
positive.code:       </td> 
      </tr> 
      <!-- Lightning talks -->
      <%= timeslot_tr("13:15&nbsp;&#8209;&nbsp;14:00", @periods_by_time_and_scene[2]) %>
      <%= timeslot_talks_tr(@periods_by_time_and_scene[2]) %>
      <tr>
        <td class="time">14:15&nbsp;&#8209;&nbsp;14:45</td> 
  
negative.code:     </tr>
      <%= timeslot_with_location_tr("9:15&nbsp;&#8209;&nbsp;10:00", @periods_by_time_and_scene[3]) %>
      <%= timeslot_talks_tr(@periods_by_time_and_scene[3]) %>
      <%= timeslot_with_location_tr("10:15&nbsp;&#8209;&nbsp;11:00", @periods_by_time_and_scene[4]) %>
      <%= timeslot_talks_tr(@periods_by_time_and_scene[4]) %>
      <%= timeslot_with_location_tr("11:15&nbsp;&#8209;&nbsp;12:00", @periods_by_time_and_scene[5]) %>
      <%= timeslot_talks_tr(@periods_by_time_and_scene[5]) %>
      <tr>
        <td class="time">12:00&nbsp;&#8209;&nbsp;13:15</td> 
  