LayoutTests/fast/text/trimmable-whitespace-followed-by-br.html

<style>
div {
  position: absolute;
  font-size: 100px;
  font-family: Ahem;
  color: green;
}
</style>
PASS if no red.
<div style="background-color: red">X <br></div>
<div style="background-color: green">X<br></div>