<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Non-reference case for text-decoration with subelements</title>
    <style>
      p {
        margin: 0;
        padding: 1em;
      }
      div.wrapper {
        font-size: 2em;
      }
      span, sub, sup {
        text-decoration: underline;
      }
    </style>
  </head>
  <body>
    <p>Test passes if there is a single uniform underline for all the text in each line,
      <i>not</i> a separate underline for the superscripts:
    </p>
    <div class=wrapper>
      <p><span>Einstein said that <i>e = mc<sup>2</sup></i>.</span></p>
      <p><span>Is <i>a<sup>n</sup> + b<sup>n</sup> = c<sup>n</sup></i> ever true for <i>n</i> &gt; 2?</span></p>
    </div>
  </body>
</html>