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Test Info:

<html>
<head>
<script>
window.addEventListener('load', () => {
const range = new Range()
const fragment = range.cloneContents()
range.selectNodeContents(document)
document.designMode = 'on'
document.replaceChild(fragment, document.documentElement)
const selection = window.getSelection()
selection.addRange(range)
document.execCommand('indent', false, null)
})
</script>
</head>
</html>
<!-- COMMENT -->