LayoutTests/fast/ruby/ruby-base-with-breakable-content-inside-expected.html

<style>
body {
  font-family: Ahem;
}
div {
  width: 10px;
}
rt {
  color: transparent;
}
</style>
<!-- PASS if X characters are right below each other -->
<div><ruby>X<br>X<br>X<rt>X</rt></ruby></div>