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Test Info:

<!DOCTYPE html>
<html>
<head>
<script>
function boom()
{
document.getElementById("a").appendChild(document.createTextNode("\n"));
}
</script>
</head>
<body onload="boom();">
<div id="a" style="max-width: max-content; column-count: 2;"><span style="white-space: pre-line;"><span>
</span>
</span></div>
</body>
</html>