bug#4981: C-l during query-replace

[Stefan Monnier]

> Thanks for fixing this.  Are you sure that the new `recenter-positions'
> is needed?  Given that there are 3 choices, it's easy to cycle through
> them, so adding yet another defcustom that would be use by a very small
> number of users does not seem justified (IMHO).

I agree that it's overengineering.  This patch is only acceptable if
(to compensate) it unifies the two duplicate code paths of
move-to-window-line-top-bottom and recenter-top-bottom.


        Stefan