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Test Info:

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function boom()
{
var li = document.getElementById("li");
li.removeChild(li.lastChild);
}
</script>
</head>
<body onload="boom();">
<ul id="ul">
<li id="li" style="column-count: -1; white-space: pre-wrap;"><span>A</span><span>B</span><span style="float: right;"></span>
</li>
</ul>
</body>
</html>