.arcconfig

py3: drop ui.flush() during interactive patch filtering

With previous changeset fixing line buffering on stdout, this is no
longer needed.

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