<tr class="hr-diff-linenum">
 <td width="50%">
   &nbsp; <b>Line <?php echo $lefthead ?> </b>
   &nbsp;<?php echo $headfunc ?>
 </td>
 <td width="50%">
   &nbsp; <b>Line <?php echo $righthead ?> </b>
   &nbsp;<?php echo $headfunc ?>
 </td>
</tr>
