view .arcconfig @ 45589:3d5b2b8e93fd

changing-files: move default constructor value to None

According to Augie Fackler, using tuple as default value confuse PyType when
actual values are passed at init time.

Differential Revision: https://phab.mercurial-scm.org/D9086

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