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Test Info:
<html>
<head>
<script>
window.addEventListener('load', () => {
document.documentElement.contentEditable = true
document.execCommand('indent', false, null)
const selection = document.getSelection()
selection.collapse(document.documentElement, (3474956128 % document.documentElement.childNodes))
document.execCommand('indent', false, null)
document.execCommand('outdent', false, null)
})
</script>
</head>
</html>