Re: diff: suboptimal behaviour with errors

[Paul Eggert]

I think I'd rather continue to use '2' for unspecified trouble, and
use other small integers greater than 2 for particular forms of
trouble that need to be broken out.  I wouldn't use numbers like 100
or 111.

It does seem to me that other programs depend on the current 0/1/2
behavior, so it makes sense to enable the fine-grained error status
codes only as an option.