[PATCH 4 of 5 BLACKGNAROK] formatting: make black --quiet in the example `hg fix` config

[Pierre-Yves David]

# HG changeset patch
# User Pierre-Yves David <pierre-yves.david at octobus.net>
# Date 1570463494 14400
#      Mon Oct 07 11:51:34 2019 -0400
# Node ID 423493e0127d6328bc948025886a8c8fe4150957
# Parent  176c569d499555cc64522bf8bd1e5acddc92a991
# EXP-Topic blackgnarok-bytemageddon
# Available At https://bitbucket.org/octobus/mercurial-devel/
#              hg pull https://bitbucket.org/octobus/mercurial-devel/ -r 423493e0127d
formatting: make black --quiet in the example `hg fix` config

I do like cake, but I cannot have so many of them.

diff --git a/contrib/examples/fix.hgrc b/contrib/examples/fix.hgrc
--- a/contrib/examples/fix.hgrc
+++ b/contrib/examples/fix.hgrc
@@ -11,5 +11,5 @@ rustfmt:pattern = set:**.rs
 # git+https://github.com/python/black/@d9e71a75ccfefa3d9156a64c03313a0d4ad981e5
 # to have the dependencies for grey.
 #
-# black:command = python3.7 contrib/grey.py -l 80 -t py33 --skip-string-normalization -
+# black:command = python3.7 contrib/grey.py -l 80 -t py33 --quiet --skip-string-normalization -
 # black:pattern = set:**.py - hgext/fsmonitor/pywatchman/** - mercurial/thirdparty/** - "contrib/python-zstandard/**"