Empty-like tables:
  input: |
    table. 0
    |=. 0
    |^.
    |_. 0 |_. 0|
    |-.
    |0|0|
    | 0 | 0 |
    |~.
    |\2. 0 |
  expect: |
    <table summary="0">
    	<caption>0</caption>
    	<thead>
    		<tr>
    			<th>0 </th>
    			<th>0</th>
    		</tr>
    	</thead>
    	<tbody>
    		<tr>
    			<td>0</td>
    			<td>0</td>
    		</tr>
    		<tr>
    			<td> 0 </td>
    			<td> 0 </td>
    		</tr>
    	</tbody>
    	<tfoot>
    		<tr>
    			<td colspan="2">0 </td>
    		</tr>
    	</tfoot>
    </table>