bug#20728: 25.0.50; grep and grep-find templates should have a place holder for the --color argument

[Juri Linkov]

> I've just pushed a commit that reuses <C> for both -i and --color (<C>ase
> and <C>olor, we can still pretend it's mnemonical), simply because there
> are templates out there with <C> in them, which do not include "--color".

Does zgrep still work after your changes?

> I haven't found any. OTOH, it doesn't hurt anyone either. Maybe the right
> change would be to make the code use it, actually. Are there use cases for
> changing the value of null-decide dynamically?

This is only a hypothetical case.

> And speaking of needs, what is the use case for "--color" without "always"?
> Instead of special-casing Windows and DOS, why don't we always use `always'
> for coloring?

Maybe some users don't want highlighting?