py3: almost fix test-trusted.py
The test now only fails due to output format changes on the repr of
mercurial.error.ParseError. I'm not really sure how to approach that
for now.
Differential Revision: https://phab.mercurial-scm.org/D5685
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}