Missing the <xmp> element. I know it's depreciated but it is still supported in every browser according to https://developer.mozilla.org/en-US/docs/Web/HTML/Ele

Missing the <xmp> element. I know it's depreciated but it is still supported in every browser according to https://developer.mozilla.org/en-US/docs/Web/HTML/Element/xmp https://developer.mozilla.org/en-US/docs/Web/HTML/Element/xm... It comes in handy for debugging.