pandoc/test/command/7713.md

```
% pandoc
| aaaaaaaaaaaa | bbbbb | ccccccccccc                                                       |
| ---          | ---   | ---                                                               |
|              |       | cccccccccc cccccccccc cccccccccc cccccccccc cccccccccc cccccccccc |
^D
<table>
<colgroup>
<col style="width: 33%" />
<col style="width: 33%" />
<col style="width: 33%" />
</colgroup>
<thead>
<tr class="header">
<th>aaaaaaaaaaaa</th>
<th>bbbbb</th>
<th>ccccccccccc</th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td></td>
<td></td>
<td>cccccccccc cccccccccc cccccccccc cccccccccc cccccccccc
cccccccccc</td>
</tr>
</tbody>
</table>
```