Re: Allow mark-paragraph to mark more than 1 paragraph

[Richard Stallman]

      But what do we do for marking
    _preceding_ paragraphs?  Leave point at end (ie, closer to point-max)
    and mark at beginning (ie, closer to point-min)?

Yes, I think so.  This way, an arg of -1 means mark one paragraph this
way--the same region as (mark-paragraph) now, but with the ends
swapped.

I see no useful meaning for (mark-paragraph 0), so you can make
it get an error.