bug#44503: 27.1; image-scroll-up and image-scroll-down

[Lars Ingebrigtsen <larsi@gnus.org>]

Eli Zaretskii <eliz@gnu.org> writes:

>> Well, the doc strings for these commands don't really describe
>> interactive usage at all, but I think most people would interpret what's
>> there as "it's like (interactive "p"), but with no prefix at all it
>> behaves differently".  (Which is what it does -- a full screen instead
>> of a line.)
>
> What about the value of '-' ?
>
>> Stating this explicitly in the doc strings of these four commands would
>> be nice.  So something like:
>> 
>> Interactively, giving this command a numerical prefix will scroll by
>> that many lines.  Without a prefix, scroll by a full screen.
>
> Btw, the doc strings also use both N and ARG, but should only use N.

I think I've now fixed all of this in the affected for doc strings in
Emacs 29.

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