The regex pattern for [HTML comments and declarations](https://github.com/commonmark/commonmark-spec-web/blob/gh-pages/js/commonmark.js#L7464-7466) do not match those of [`commonmark.js`](https://github.com/commonmark/commonmark.js/blob/master/lib/common.js#L27-L29). This leads to unexpected rendering of inline raw HTML: [example](https://spec.commonmark.org/dingus/?text=a%3C!doctype%3E%0A%0Aa%3C!--%20---%3E%0A).
The regex pattern for HTML comments and declarations do not match those of
commonmark.js. This leads to unexpected rendering of inline raw HTML: example.