templates/shortlogentry.tmpl

hg grep: handle re.compile errors & update tests/test-grep

<table class="slogEntry parity#parity#">
 <tr>
  <td class="age">#date|age#</td>
  <td class="author">#author|person#</td>
  <td class="node"><a href="#url#rev/#node|short#{sessionvars%urlparameter}">#desc|strip|firstline|escape#</a></td>
 </tr>
</table>