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

relnotes: more improvements

py3: don't use universal_newlines in svnsubrepo On Python 3, it means text=True without any specific encoding, which is pretty bad. Instead, use util.fromnativeeol() to translate CR+LF to LF without encoding conversion.

py3: remove unneeded fsencode() from gitsubrepo Here p.stdout isn't a TextIO. read() must return bytes.

debugcommands: add a debugpathcopies command I've been working on storing copy metadata in the changelog instead of the filelog and this has been useful for debugging. Do we usually add tests for these? Differential Revision: https://phab.mercurial-scm.org/D5791

py3: record several more passes from the buildbot ratchet Differential Revision: https://phab.mercurial-scm.org/D5799

grep: respect ui.relative-paths Differential Revision: https://phab.mercurial-scm.org/D5777

grep: move writing of path outside of column loop This will make the next patch simpler. Differential Revision: https://phab.mercurial-scm.org/D5776

resolve: respect ui.relative-paths Differential Revision: https://phab.mercurial-scm.org/D5748