anchor.diff:            <% unless classdata.length == 0 %>
               <tr>
                 <td><strong>Class <%= @classes[classdata[0].class_id - 1].name %></strong></td>
  -              <td></td><td></td><td></td><td></td>
  +              <td></td><td></td><td></td><td></td><td></td>
               </tr>
               <% classdata.each do |entry| %>
                 <tr>
  
positive.code:                 <td><%= entry.brand %></td>
                  <td><%= entry.typenum %></td>
                  <td><%= entry.serialnum %></td>
                </tr>
              <% end %>
            <% end %>
  
negative.code:           <th>Brand</th>
            <th>Type</th>
            <th>Serial</th>
            <th style="width:17px;"></th>
          </tr>
        </thead>
        <tbody>
  