Subject: bug#57604: [ef]grep usage -> POSIXLY_CORRECT?

From: Gary Johnson <[email-masked]>
Date: Wed, 7 Sep 2022 05:36:10 -0700

On 2022-09-07, Simon Josefsson via Bug reports for GNU grep wrote:

> Personally, I'd rather have tools exit with an error code on invalid
> uses rather than issuing warning messages.

The warning messages are merely annoying.  Returning a non-zero exit
status would break scripts, and in many cases, silently.

Regards,
Gary