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

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Date: Mon, 02 Nov 2015 02:14:47 +0200
> Cc: 17453@debbugs.gnu.org, Stefan Monnier <monnier@iro.umontreal.ca>,
>       emacs-devel@gnu.org
> 
> Since there is no other core library that require so much changes to
> adapt to follow-mode, and there are already some mode-specific hooks
> in follow.el like compilation-filter-hook, indicates that it's the
> responsibility of follow.el to support isearch in follow-mode.  So I
> believe the right way to do this is like Artur presented in a short
> patch, and maybe it's possible to simplify it even more by using
> isearch-update-post-hook with a follow-align-compilation-windows
> like hook.  I mean something like (add-hook
> 'isearch-update-post-hook follow-align-isearch-windows t t)

I agree.