This is a ridiculous patch. And I understand entirely if nobody else
cares, because I don't think anybody else has ever even noticed.

It turns out that I still use "git rev-list" outside of some hard-core
scripting for one silly reason: the linux-next statistics are all
about non-merge commits, and so to do a rough comparison with
linux-next, I do

        git rev-list --count --no-merges v4.20..

to get an approximate idea of how much I've merged compared to what is
in linux-next.

(See also

        http://neuling.org/linux-next-size.html

for the graphical view of it all, even though it looks a bit odd right
now because of how linux-next wasn't being updated over the holidats
and right at the 4.19 release).

Anyway, I've occasionally thought to myself that I should just fix
"git log" to learn that too, so that I wouldn't have to type out "git
rev-list". Because "git log" does actually take the "--count"
argument, it just doesn't honor it.

This is that patch.

                    Linus