Rule proposal: html comment content newline

[ota-meshi]

Please describe what the rule should do:

Enforce newline before and after HTML comment content.

What category of rule is this? (place an "X" next to just one item)

[x] Enforces code style
[ ] Warns about a potential error
[ ] Suggests an alternate way of doing something
[ ] Other (please specify:)

Provide 2-3 code examples that this rule will warn about:

<!-- multiline
comment -->

<!--

Too many newlines

-->

Why should this rule be included in ESLint (instead of a plugin)?

I think it should be included for the beauty of the Vue source code.

[ota-meshi]

I think it would be nice if there are rules that can keep the next style guide.

https://www.w3schools.com/html/html5_syntax.asp

HTML Comments

Short comments should be written on one line, like this:

<!-- This is a comment -->

Comments that spans more than one line, should be written like this:

<!-- 
  This is a long comment example. This is a long comment example.
  This is a long comment example. This is a long comment example.
-->