anchor.diff:          <th width="20%">Student</th>
       <% end %>
       <th>Mission</th>
  -    <th width="20%">Submitted at </th>
  +    <th>Submitted at </th>
   
       <th width="15%">
         <% if can? :manage, SubmissionGrading %>
  
positive.code:         <% end %>
          <td><%= link_to sub.get_asm.get_title, sub.get_asm.get_path %></td>
          <td><%= time_ago_in_words(sub.submit_at || sub.created_at) %> ago</td>
          <% if can? :manage, SubmissionGrading %>
              <td>
                <% sub.submission_gradings.each do |sg| %>
                    <%= link_to sg.get_name, sub.get_path %><br/>
                <% end %>
              </td>
              <% if sub.submission_gradings.length == 0 %>
  
negative.code:       <% else %>
            Status
        <% end %>
      </th>
      <th>
        Grade
      </th>
      <th width="10%">Action</th>
    </tr>
  