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Test Info:

<!DOCTYPE html>
<html>
<head>
<script>
function boom()
{
var mo = document.createElementNS("http://www.w3.org/1998/Math/MathML", "mo");
var text = document.createTextNode(" ");
mo.appendChild(text);
document.body.appendChild(mo);
window.getSelection().removeAllRanges();
var r = document.createRange();
r.setStart(mo.firstChild, 0);
r.setEnd(mo.firstChild, 1);
window.getSelection().addRange(r);
window.getSelection().toString();
}
</script>
</head>
<body onload="boom();"></body>
</html>