anchor.diff:  <h2>Heures EDT</h2>
   
   <p>
  -  <%= @user.events.cm.sum :teacher_hours %> CM
  -  / <%= @user.events.td.sum :teacher_hours %> TD
  -  / <%= @user.events.tp.sum :teacher_hours %> TP
  +  <%= @user.events.cm.sum :duration %> CM
  +  / <%= @user.events.td.sum :duration %> TD
  +  / <%= @user.events.tp.sum :duration %> TP
   </p>
   
   <table class="table">
  
positive.code:       <th>Module</th>
        <th>Type</th>
        <th>Date</th>
        <th>Heures enseignant</th>
        <th>Heures étudiant</th>
      </tr>
    </thead>
    <tbody>
  
negative.code:         <td><%= link_to event.teaching_module, event.teaching_module %></td>
          <td><%= event.kind.to_s.upcase %></td>
          <td><%= event.date.strftime "%d/%m/%Y" %></td>
          <td><%= event.duration %></td>
        </tr>
      <% end %>
    </tbody>
  