py3: add alternate output on Python 3 This is basically the same deal as D5806. Python 3's exception printing output is different. We had to tweak the regular expression to match appropriately, hence the added line of output. Differential Revision: https://phab.mercurial-scm.org/D5807

py3: add Python 3 output for test-flagprocessor.t The exception is being generated from ui.traceback(), which simply calls traceback.format_*() to format exceptions. Since the output from the standard library has changed, there is seemingly not much we can do about it. So this commit adds conditional output depending on the Python version. I'm not thrilled about b'' appearing in user-facing output. Can we do something better here? Differential Revision: https://phab.mercurial-scm.org/D5806

zeroconf: Python 3 porting of vendored library A quick glance through this module reveals that most of it "just works" on Python 3 with the source transformer active. There are a few places where we need to ensure we're using str. Differential Revision: https://phab.mercurial-scm.org/D5804