Subject: Re: bug#36960: mistake with v param

From: Paul Eggert <[email-masked]>
Date: Thu, 2 Jan 2020 01:46:24 -0800

On 8/7/19 8:45 AM, Daniele Grassini wrote:
> so why the '-o' option check the regular exp, but the '-v' don't do his job??

The -v option was working as documented. It means, "select lines that *don't"
match the pattern", and since all input lines matched your pattern grep didn't
output anything.