bug#17453: Isearch doesn't work properly with Follow Mode.

[John Wiegley]

>>>>> Alan Mackenzie <acm@muc.de> writes:

> The new functions are window*-start, window*-end, set-window*-start,
> recenter*, pos-visible-in-window*-p, move-to-window*-line, and sit*-for.
> 
> window*-start returns the window-start of the _first_ window in the group,
> window*-end returns the window-end of the _last_ window in the group, and so
> on, all these functions doing the Right Thing for a group of windows.
> sit*-for exists, because Follow Mode needs a chance to resynchronise its
> windows before redisplay happens.

What is the reason for having separate functions such as window*-start,
instead of just taking the car of a list of windows?  I may be missing some
context here, but this sounds like special-casing general behavior, and I'm
wondering why it's necessary...

John