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Test Info:

<!DOCTYPE html>
<html class="reftest-wait">
<body>
<p>
<math>
<mo id="mo1">%</mo>
</math>
</p>
<p>
<math>
<mo id="mo2" lspace="3em">%</mo>
</math>
</p>
<p>
<math>
<mo id="mo3">%</mo>
<mo>%</mo>
</math>
</p>
<p>
<math>
<mo id="mo4" lspace="3em">%</mo>
<mo >%</mo>
</math>
</p>
<p>
<math id="math1">
<mo>%</mo>
</math>
</p>
<p>
<math id="math2">
<mo>%</mo>
<mo id="mo5">%</mo>
</math>
</p>
<script type="text/javascript">
function doTest() {
// Add and remove lspace
document.getElementById("mo1").setAttribute("lspace", "3em");
document.getElementById("mo2").removeAttribute("lspace");
// and again but with an inferred mrow
document.getElementById("mo3").setAttribute("lspace", "3em");
document.getElementById("mo4").removeAttribute("lspace");
// Change to/from inferred mrow
var mo1 = document.createElementNS("http://www.w3.org/1998/Math/MathML", "mo");
mo1.innerHTML = "%";
document.getElementById("math1").appendChild(mo1);
document.getElementById("math2").removeChild(document.getElementById("mo5"));
document.documentElement.removeAttribute("class");
}
window.addEventListener("MozReftestInvalidate", doTest);
</script>
</body>
</html>