pycompat: when setting attrs, ensure we use sysstr
The custom module importer was making these bytes, so when we poked
values into self.__dict__ we had bytes instead of unicode on py3 and
it didn't work.
#require test-repo
$ . "$TESTDIR/helpers-testrepo.sh"
$ cd "$TESTDIR"/..
New errors are not allowed. Warnings are strongly discouraged.
$ hg files "set:(**.py or **.txt) - tests/**" | sed 's|\\|/|g' |
> python contrib/check-config.py