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<!DOCTYPE html>
<meta charset="utf-8">
<title>Test reference</title>
<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>