chromium/third_party/blink/web_tests/fast/ruby/ruby-column-break.html

<!DOCTYPE html>
<body>
This is a test for multiple ruby columns and line breaks.
There is a div with a blue border and 10px padding. This contains a single &lt;ruby&gt; markup in the text contained in the block, broken across 2 lines. 
Part of it should be on the first line, the rest on the other line.
<br>
<br>
<div style="border: 2px solid blue; padding: 10px; width:260px;">
&lt;ruby&gt; is defined in the <ruby>H<rt>Hyper</rt>T<rt>Text</rt>M<rt>Markup</rt>L<rt>Language</rt>5<rt>Level 5</rt></ruby> specs.
</div>
</body>