t_sed</td>
<td valign="top" width="43%">Allows only a sed-like syntax.</td>
<td valign="top" width="9%">&nbsp;</td>
</tr>

<tr>
<td valign="top" width="9%">&nbsp;</td>
<td valign="top" width="39%">format_perl</td>
<td valign="top" width="43%">Allows only a perl-like syntax.</td>
<td valign="top" width="9%">&nbsp;</td>
</tr>

<tr>
<td valign="top" width="9%">&nbsp;</td>
<td valign="top" width="39%">format_no_copy</td>
<td valign="top" width="43%">Disables copying of unmatched sections
to the output string du