bug#31325: 27.0.50; PROPOSAL: introduce a new function to recenter without redisplaying the frame

[Eli Zaretskii]

> Date: Sun, 01 Jul 2018 20:03:21 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 31325@debbugs.gnu.org, monnier@iro.umontreal.ca
> 
> Alternatively, we could simply make 'recenter' behave specially in
> interactive invocations.  But in any case, incompatible changes in
> behavior are bad, and should be avoided.

Or maybe invert the meaning of the new argument?