<!DOCTYPE html>
<meta charset="UTF-8">
<title>Justification with ruby span</title>
<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org">
<link rel="author" title="Mozilla" href="https://www.mozilla.org">
<link rel="stylesheet" href="support/ruby-common.css">
<style>
  body { line-height: 3; }
</style>
<div style="width: 200px; height: 100px; text-align-last: justify; overflow: auto;"><ruby>
  <rb>a</rb><rb>b</rb>
</ruby></div>