bug#7906: keep the buffer still in rmail mode

[hf]

Hello Glenn,

Your email address <rgm@gnu.org> was unreachable, so I am still
sending my email to bug-gnu-emacs@gnu.org

Best,
H.

> hf@hongfeng.ch wrote:
>
>> I am using Emacs 23.2.1 on FreeBSD 7.1.  When I tried to receive
>> incoming emails by typing `g' under the rmail mode, the entire
>> buffer of emacs blinked (it acts the same on the X Window and
>> the text-only terminal), this is not so nice.  In the earlier
>> version, only the echo area prompts some text, and the main buffer
>> is refreshed only when a new email comes.
>
> Sorry, I am not able to reproduce this. My Emacs 23.2 seems to behave
> like you say earlier versions did.
>
> Can you give a complete example of the problem starting from `emacs -Q'?
>

My concern or wish is: when I enter the rmail mode, and type `g',
the main buffer should NOT change anything if no email comes, only
in the echo area, it prompts a string "No new email."  If some emails
are fetched from the email box, then the main buffer is refreshed to
display the first new email, and in the echo area it prompts how many
emails have received, for example "2 emails received".

The current situation is, whenever I typed `g', the entire buffer swing
(vertically, not horizontally) within very short time (maybe less than
0.1 seconds), but it is visually and perceivable, if such swing won't
happen as I described, then it would be very good!

If you can not reproduce the problem, I may send you a video file
(just the size of the file may a little bit big to send) to show it.