.arcconfig

localrepo: correct docstring of filectx()

The same reason as b6c2543e1dd8. It can't be any changeset specifiers but
revision number.

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