olor: red;
  font-family: monospace;
  line-break: anywhere;
}
span {
  background: red;
}
</style>

<p>Test passes if there is a green rectangle below and no red.</p>
<div id=green></div>
<!-- with line breaks everywhere, none of the following characters should stick out from under the green div -->
<div id=test>aa-a.a)a,a）a<span>&nbsp;</span>a&#xfeff;a&#x2060;a&#x200d;a･a</div>
