anchor.diff:          <tbody>
             <% @mediaobject.group_exceptions.each do |group| %>
           <tr>
  +          <td><%= check_box_tag 'groups[remove]', group %></td>
             <td><%= group %></td>
  -          <td class="controls">[delete]</td>  
           </tr>
         <% end %>
         </tbody>
  
positive.code: 
      <div class="whitespace" id="exceptions">
      <h4>Exceptions</h4>
      <table class="table table-striped table-hover">
        <% unless @mediaobject.group_exceptions.empty? %>
        <thead>
  
negative.code:         <tbody>
            <% @mediaobject.user_exceptions.each do |user| %>
          <tr>
            <td><%= check_box_tag 'users[remove]', user %></td>
            <td><%= user %></td>
          </tr>
        <% end %>
        </tbody>
      <% end %>
      </table>
  
          <%= text_field_tag :value %>
          <%= select_tag :scope, options_for_select(['Group', 'User']) %>
          <%= submit_tag 'Add' %>
  