Re: filling long html href

[Richard Stallman]

    I'd be inclined to make paragraph-start match all tags (as it does
    now) except the ones described as "text level" elements by the specs,
    like <code> etc, because they're not paragraph breaks in the resulting
    browser display.

How would you write paragraph-start to do that?
I think it is very hard, perhaps impossible.
That is why I suggest you try actually writing it.