    flow, to force the inline-block to synthesize its baseline from its
       margin box.  (This is how the corresponding piece of the testcase is
       supposed to render). -->
  a
  <div class="container inline-block">
    <div style="position: absolute">block</div>
  </div>
  b
  <br>

  a
  <div class="container inline-flex">flex</div>
  b
  <br>

  a
  <div class="container inline-grid">grid</div>
  b

</body>
</html>
