<!DOCTYPE HTML>
<html><head>
<style>
p { width: 13em; border: 1px solid black; }
p span { white-space: nowrap; }
a { color:pink; }
</style>
</head>
<body>
<!-- We should be able to break even when the only break opportunity is within a span
that overflows the line width (the break opportunity after the whitespace is treated
as a break before the first character of the second span) -->
<p><span>mmmmmmmmmm</span>
<span>mmmmm<a>mmmmm</a></span></p>
<!-- A span that overflows the line width should be allowed to fit, it might have a break
opportunity inside it (the break opportunity after the whitespace is treated
as a break before the first character of the second span) -->
<p>m <span>mmmmmmmmmm</span>
<span>m<a>mmmmmmmmm</a></span></p>
</body>
</html>