" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">file</td>
    <td valign="top">file for which the token should be replaced.</td>
    <td align="center" rowspan="2">Exactly one of the two.</td>
  </tr>
  <tr>
    <td valign="top">dir</td>
    <td valign="top">The base directory to use when replacing a token in 
      multiple files.</td>
  </tr>
  <tr>