Comment 4 for bug 1892423

It seems we it that bug on a deployment today too (mailman3-web):

$ mojo deploy-diff --preview-config
/srv/juju-dist/latest-2.x/usr/bin/juju config mailman3-web extra_packages=django-mailman-launchpad-teams python-contextlib2 python-django-openid-auth python-raven check-lists-conf=b'W2....

mojo deply-show shows a few !!binary values.