<!DOCTYPE html>
<meta charset="utf-8">
<title>Test reference</title>
<link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net/">
<style>
div {
  font-size: 2rem;
  margin: 1rem;
  white-space: pre;
  width: 5ch;
  border: solid 1px;
  font-family: monospace;
}
span {
  text-decoration: underline;
}

</style>

<p>Test passes if the two boxes below are identical.

<div> <span> 0 </span></div>
<div> <span> 0 </span></div>