.arcconfig

sparse: use named parameters in i18n strings

This should give more hints about what the %s means, and allow reordering.

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