Regression in table.el detection? [maint]

[Kaushal Modi]

Hello,

There has been a recent regression in table.el detection.

Earlier, this used to be detected as a table.el table, but now it's not
(entirely):


+----------+----------+----------+
| Header 1 | Header 2 | Header 3 |
+----------+----------+----------+
| a        | b        | c        |
+----------+----------+----------+
| d        | e        | f        |
+----------+----------+----------+


Before:

<table border="1">
  <tr>
    <td align="left" valign="top">
      &nbsp;Header&nbsp;1&nbsp;
    </td>
    <td align="left" valign="top">
      &nbsp;Header&nbsp;2&nbsp;
    </td>
    <td align="left" valign="top">
      &nbsp;Header&nbsp;3&nbsp;
    </td>
  </tr>
  <tr>
    <td align="left" valign="top">
      &nbsp;a&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    </td>
    <td align="left" valign="top">
      &nbsp;b&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    </td>
    <td align="left" valign="top">
      &nbsp;c&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    </td>
  </tr>
  <tr>
    <td align="left" valign="top">
      &nbsp;d&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    </td>
    <td align="left" valign="top">
      &nbsp;e&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    </td>
    <td align="left" valign="top">
      &nbsp;f&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    </td>
  </tr>
</table>


After:

<table border="1">
  <tr>
    <td align="left" valign="top">
      &nbsp;Header&nbsp;1&nbsp;
    </td>
    <td align="left" valign="top">
      &nbsp;Header&nbsp;2&nbsp;
    </td>
    <td align="left" valign="top">
      &nbsp;Header&nbsp;3&nbsp;
    </td>
  </tr>
</table>

I stumbled across this regression as I was looking into why my weekly cron
for ox-hugo tests failed:
https://travis-ci.org/github/kaushalmodi/ox-hugo/jobs/752831865


--
Kaushal Modi