[PATCH 1 of 3 STABLE] contrib: fix up example fix configuration for our move to released black

[Yuya Nishihara]

On Wed, 30 Oct 2019 16:39:45 -0400, Augie Fackler wrote:
> # HG changeset patch
> # User Augie Fackler <augie at google.com>
> # Date 1572466659 14400
> #      Wed Oct 30 16:17:39 2019 -0400
> # Branch stable
> # Node ID 0dc1b2cc8e1784b059728c9d9decaf58a50937ae
> # Parent  2278f79e85e96a5ca389f77c47d92a3dc9348443
> contrib: fix up example fix configuration for our move to released black

Queued for stable, thanks.