.arcconfig

manifestcache: further fix to debug command output

Removing more capital letters. The output will get a test once other issues get
fixed.

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