anchor.diff:          </td>
       </tr>
       <%= timeslot_workshops_tr(@w[1]) %>
  -    <tr><td class="time">10:15&nbsp;‑&nbsp;11:00</td> 
  +    <tr><td class="time">15:00&nbsp;‑&nbsp;16:30</td> 
           <td class="slot salOlympia">
               <div class="event"></div>
               <span class="location">Workshop 1</span>
  
positive.code:         <span class="location right">Foajé</span> 
        </td> 
      </tr>
      <tr><td class="time">10:15&nbsp;‑&nbsp;11:00</td> 
          <td class="slot salOlympia">
              <div class="event"></div>
              <span class="location">Workshop 1</span>
  
negative.code:     </tr>
      <%= timeslot_workshops_tr(@w[5]) %>
      <tr>
        <td class="time">15:30&nbsp;&#8209;&nbsp;16:15</td> 
        <td colspan="2" class="slot salOlympia"> 
          <div class="event">Keynote: Jurgen Appelo</div><span class="location right">Olympia</span> 
  