[Toybox] Grep --color and tests.

[enh]

On Thu, Dec 27, 2018 at 12:18 PM Rob Landley <rob at landley.net> wrote:
>
> On 12/27/18 12:46 PM, enh wrote:
> > meh, BSD-based regex implementations seem to think that the empty
> > regex is an error anyway. (i only skimmed it, but i think POSIX
> > agrees: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html)
>
> Earlier versions I was catching the empty regex and manually matching the whole
> thing, I can do that again. :)
>
> (Some build script somewhere cared, I forget which since I haven't gotten the
> LFS/BLFS build environment recreated yet...)

really? isn't this just a pathologically stupid way to say `cat`?

> Rob