Events from pulldown-cmark:
"<\\!p>" -> [
Start(Paragraph)
InlineHtml(Borrowed("<\\!p>"))
End(Paragraph)
]
Events from commonmark.js:
"<\\!p>" -> [
Start(Paragraph)
Text(Boxed("<!p>"))
End(Paragraph)
]
commonmark.js is in the right here. It matches most other implementations, and the inline tag grammar doesn't seem to allow this.