beautifygraph: use slicing instead of subscripting on bytestr Differential Revision: https://phab.mercurial-scm.org/D4246

beautifygraph: use sysstr for checking encoding._wide # skip-blame just an r prefix Differential Revision: https://phab.mercurial-scm.org/D4245

stringutil: have buildrepr delegate to pprint for unknown types This stabilizes some revset reprs across Python 2 and 3. Differential Revision: https://phab.mercurial-scm.org/D4244

stringutil: teach pprint about sets This is the old (Python 2) way of printing sets. I actually prefer the Python 3 version of the repr, but this will result in less test churn in the short term. Differential Revision: https://phab.mercurial-scm.org/D4243

parser: replace bespoke _brepr with stringutil.pprint Differential Revision: https://phab.mercurial-scm.org/D4242

mq: use stringutil.pprint instead of pycompat.byterepr Resolves a few output changes on Python 3 in test-mq.t, and gets us two new passing tests. Differential Revision: https://phab.mercurial-scm.org/D4248

tests: remove expected output of test-parseindex2.py Everything uses unittest idioms now, so this can go away. Differential Revision: https://phab.mercurial-scm.org/D4185

parsers: adjust pure-python version to mimic a3dacabd476b This was caught by the tests, to my surprise. I'll also follow up with a test of the index[-1] behavior so we can be sure that remains consistent, as I think that currently has no coverage. Differential Revision: https://phab.mercurial-scm.org/D4183

tests: restore Python 3 compat in test-parseindex2.py I think this was previously getting lucky in Python 3, and would have stacktraced if something failed. Now that failure messages are eagerly computed, this turned into a problem. Differential Revision: https://phab.mercurial-scm.org/D4182

tests: port remaining bits of test-parseindex2 to unittest asserts Differential Revision: https://phab.mercurial-scm.org/D4181