Oh, my bad. I though -e was an option not taking arguments.

Sorry for the noise.

On Thu, Feb 4, 2016 at 6:35 PM Drew Adams <drew.adams@oracle.com> wrote:

> > We assume familiarity with grep options. The -e option of grep takes an
> > argument, namely the pattern to search for. You can either add your
> > option before the -e, or maybe you are interested in M-x rgrep.
> > I don't see this as an Emacs bug.
>
> aka `M-x man RET grep RET'
>
> That shows:
>
> grep  [OPTIONS]  [-e  PATTERN   |   -f   FILE]  [FILE...]
>