bug#18697: 25.0.50; [PATCH] hi-lock interactive functions now default to the active region, if there is one

[Juri Linkov]

>> Perhaps something like this should be added to (read-regexp),
>> but that's a bigger proposal than this small patch.
>
> I don't care what you do to hi-lock. However, wrt `read-regexp':
> I certainly hope not. That would make that function useless for
> any command that wants to act on the active region (e.g., vs
> the buffer if inactive).

There is no problem in using the active region in `read-regexp' as
we discussed it in http://thread.gmane.org/gmane.emacs.devel/168564