Allow self-closing tags everywhere #9491
Description
People really seem to like self-closing tag syntax (see the replies to https://twitter.com/jaffathecake/status/1676843832284004353).
Maybe a switch should be added to allow them to be used on all elements?
<!doctype html allow-self-closing-or-whatever>
<!-- Now self-closes: -->
<div/>
<my-component/>
<script src="…"/>Right now, documents can be a mix of rules where /> is largely meaningless, except in SVG and MathML. Making everything consistent seems… good?