Re: [PATCH 4/8] grep.c: move "prefix" out of "struct grep_opt"

> > All of that is to say that I share your motivation for this patch and
> > think that the direction is good, but I would have preferred to do it
> > without the caller_priv variable (unless there is something that I am
> > missing here).
>
> Yes, that would make much more sense. I just had tunnel vision while
> writing this, evidently. Yeah, just either passing it or using a static
> variable in grep.c would make more sense.
>
> Arguably we could even have it be read only (const char *const) and have
> a global "the_prefix" or something, but it's probably not widely used
> enough for that to make sense.