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Test Info:

<html xmlns="http://www.w3.org/1999/xhtml" xmlns:svg="http://www.w3.org/2000/svg"><!-- no body element, intentionally --><div style="display: table-column-group;"/><svg:symbol id="s"/><script>
document.documentElement.offsetHeight;
document.getElementById("s").style.display = "table-column-group";
</script></html>