Sometimes I use GNU/Linux, sometimes MacOS.  On MacOS, I have:

grep --version
grep (BSD grep) 2.5.1-FreeBSD

Bob

On Wed, Sep 30, 2020 at 5:19 AM Jean Louis <bugs@gnu.support> wrote:

> * Robert Weiner <rsw@gnu.org> [2020-09-30 07:25]:
> > {C-h h f g} works fine here.
>
> I really wonder, could you tell me which system are you using? Is it
> GNU/Linux or other?
>
> Which grep is used there?
>
> Jean
>