.arcconfig

py3: byteify test-lock.py

There's still a stacktrace about not being able to serialize _io.TextIOWrapper.

{
    "conduit_uri": "https://phab.mercurial-scm.org/api",
    "repository.callsign": "HG",
    "arc.land.onto.default": "@",
    "base": "hg:.^"
}