run-tests: drop jython support
I don't think we heard anything about jython support for the past 15 years, so
let's drop special support for it in run-tests.py it is most probably broken at
that point.
#require black test-repo
Black needs the real USERPROFILE in order to run on Windows
#if msys
$ USERPROFILE="$REALUSERPROFILE"
$ export USERPROFILE
#endif
$ . "$TESTDIR/helpers-testrepo.sh"
$ cd $RUNTESTDIR/..
$ black --check --diff `testrepohg files 'set:(**.py + grep("^#!.*python")) - mercurial/thirdparty/**'`