chromium/content/test/data/accessibility/html/pre.html

<!DOCTYPE html>
<html>
<body>

<pre id="pre">This test is to check   pre
formatting.</pre>

<div id="div-pre" style="white-space:pre">This test is to check   pre
formatting</div>

<div id="div-pre-wrap" style="white-space:pre-wrap">This test is to check   pre
formatting.</div>

<div id="div-normal">This test is to check pre formatting.</div>

</body>
</html>