LayoutTests/fast/text/preserved-white-space-with-word-spacing.html

<style>
 body {
   margin: 0px;
 }
 div {
   white-space: pre;
   font-family: Ahem;
   font-size: 50px;
   margin-left: -400px;
 }
 span {
   word-spacing: 100px;
 }
</style>
<!-- The preserved tab is not a word separator and should not trigger word-spacing -->
<div>X<span> 	X</span>X</div>