view .arcconfig @ 43324:866bd2cf764b stable

mail: catch LookupError in headdecode()

We already catch this exception in _encode() (called by headencode()).
It gets raised when running test-notify.t with Python 3.

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