f="https://www.microsoft.com/typography/otspec/gpos.htm#MMP"
  >MarkToMark Attachment Positioning Subtable</a> for stacking
  accents.  If your text rendering engine is correct, the accents
  should be positioned on top each other.  If the accents appear to
  the right of the base glyph, or if they are missing entirely, it’s a
  sign that your text rendering system is broken.
</div>

<table>
  <tr>
    <th>Expected</th>
    <td class="expected" ft:id="GPOS-4/1"
	ft:render="u&#x0308;&#x0301;"
	ft:font="Tes