zeroconf: fix non existant formatting in the vendored zeroconf module On Tue Mar 1st 2016 at 09:33:39 timeless decided to wrap long line in `hgext/zeroconf/Zeroconf.py`. Doing so, he fat fingered a "%w" instead of a "%s" in a string. %w does not exists, 4 year later, pyflakes (rightfully) complains about it. So I am fixing it. Differential Revision: https://phab.mercurial-scm.org/D8627