Bug or expected? Markdown sometimes doesn't work inside `div` tags

[chrisalley]

We ask @jgm, the author of the spec, if the behaviour is intentional or a bug. It appears to relate to whether the HTML tag is a block level tag or phrasing content (and some tags can be both).

Related discussion:

Raw HTML blocks proposals -- comments wanted

The current spec for raw HTML blocks hard-codes a list of HTML “block-level” tags. This isn’t ideal, for several reasons: New tags may be added to HTML in the future If you use custom tags in your application, they’ll always be treated as span-level, which is often not what you want (see https://github.com/jgm/CommonMark/issues/239). Some tags can be both span- or block-level (see https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Phrasing_content). The current system…