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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - Excel 2003 xml file with xls extension detected as HTML"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=123485">123485</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Excel 2003 xml file with xls extension detected as HTML
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>LibreOffice
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>6.2.0.3 release
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>UNCONFIRMED
          </td>
        </tr>

        <tr>
          <th>Keywords</th>
          <td>regression
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>filters and storage
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>libreoffice-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>momonasmon@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>noelgrandin@gmail.com
          </td>
        </tr>

        <tr>
          <th>Blocks</th>
          <td>123475
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="http://bugs.documentfoundation.org/attachment.cgi?id=149311" name="attach_149311" title="test doc">attachment 149311</a> <a href="http://bugs.documentfoundation.org/attachment.cgi?id=149311&action=edit" title="test doc">[details]</a></span>
test doc

Actual Results:

Trying to open the attached file with 6.2/master, shows the HTML import options
dialog, and after confirming opens an empty spreadsheet.

Expected Results:

Should just open a spreadsheet with the number '1' in A1 cell (like in 6.1).

Didn't perform a proper bibisect, but reverting the
svtools/source/svhtml/htmlkywd.cxx part of
<a href="https://gerrit.libreoffice.org/plugins/gitiles/core/+/7ea01578eed8459678369d0256de016930b3af40">https://gerrit.libreoffice.org/plugins/gitiles/core/+/7ea01578eed8459678369d0256de016930b3af40</a>
seems to fix the problem.

There is also a related problem about misdetection of empty files as HTML
instead of plain text which reported in <a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - Detect 0-byte files based on extension"
   href="show_bug.cgi?id=123476#c0">Bug 123476 comment 0</a>, and caused by the
same code change.</pre>
        </div>
      </p>

        <div id="referenced">
          <hr style="border: 1px dashed #969696">
          <b>Referenced Bugs:</b>
          <ul>
              <li>
                [<a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [META] Bugs with file type/format detection"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=123475">Bug 123475</a>] [META] Bugs with file type/format detection
              </li>
          </ul>
        </div>
        <br>

      <hr>
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      <ul>
          <li>You are the assignee for the bug.</li>
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