e text is correctly split by 'dir=rtl' column-span:all child in a bidi-override multi-column container.">

  <style>
  article {
    column-count: 2;
    column-rule: 6px solid;
    width: 400px;
    outline: 1px solid black;
    unicode-bidi: bidi-override; /* Needed to trigger bidi resolution. */
  }
  h3 {
    column-span: all;
    outline: 1px solid blue;
  }
  </style>

  <article>
    <div>before<h3 dir="rtl">spanner</h3>after</div>
  </article>
</html>
