Caption after tr.
<br>Nav 4.0: caption  is accepted, terminate an empty tr, 
<br>Xena6.0: ignore misplaced caption tag.
<table border>
  <tr>
  <caption>caption1</caption> taxeA
    <td>cell 1-1
    <td>cell 1-2
  <tr>
    <td>cell 2-1
    <td>cell 2-2
</table>

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