LayoutTests/fast/inline/unexpected-line-break-on-empty-content.html - WebKit - Git at Google

 <!DOCTYPE html>
 <style>
 div {
   width: 0px;
   font-family: Ahem;
   font-size: 20px;
   color: green;
 }
 </style>
 <div> X</div>
 <div> <span>X</span></div>
 <div><span> X</span></div>
 <div> <span> X</span></div>
 <div> <span style="margin: 20px;"> X</span></div>
 <div> <span style="padding: 20px;"> X</span></div>
 <div> <span><span>X</span></span></div>
 <div> <span></span><span><span>X</span></span></div>
 <div><span></span> <span></span><span><span>X</span></span></div>
 <div><span></span><span></span> <span><span>X</span></span></div>
 <div><span></span><span></span><span> <span>X</span></span></div>
 <div><span></span><span></span><span><span> X</span></span></div>
 <div><span></span><span></span><span><span style="margin: 20px"> X</span></span></div>
 <div><span></span><span></span><span><span style="padding: 20px"> X</span></span></div>
	<!DOCTYPE html>
	<style>
	div {
	width: 0px;
	font-family: Ahem;
	font-size: 20px;
	color: green;
	}
	</style>
	<div> X</div>
	<div> <span>X</span></div>
	<div><span> X</span></div>
	<div> <span> X</span></div>
	<div> <span style="margin: 20px;"> X</span></div>
	<div> <span style="padding: 20px;"> X</span></div>
	<div> <span><span>X</span></span></div>
	<div> <span></span><span><span>X</span></span></div>
	<div><span></span> <span></span><span><span>X</span></span></div>
	<div><span></span><span></span> <span><span>X</span></span></div>
	<div><span></span><span></span><span> <span>X</span></span></div>
	<div><span></span><span></span><span><span> X</span></span></div>
	<div><span></span><span></span><span><span style="margin: 20px"> X</span></span></div>
	<div><span></span><span></span><span><span style="padding: 20px"> X</span></span></div>