.arcconfig

stringutil: flip the default of pprint() to bprefix=False

If we use pprint() as a drop-in replacement for repr(), bprefix=False is more
appropriate. Let's make it the default to remove bprefix=False noise.

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