py3: use util.forcebytestr() to convert error messages to bytes This makes the python 3 buildbot green again. Differential Revision: https://phab.mercurial-scm.org/D4811

context: stop catching TypeError when converting hex nodeid to binary It has been a programming error to pass a 40-character string that is not a hex nodeid since 8b86acc7aa64 (context: drop support for looking up context by ambiguous changeid (API), 2018-04-28), so we can just let it raise a TypeError. Differential Revision: https://phab.mercurial-scm.org/D4807

context: stop catching and re-raising FilteredRepoLookupError FilteredRepoLookupError is only raised by changectx's constructor and the higher-level scmutil.revsymbol(), so there's no need to catch it in changectx's constructor. Differential Revision: https://phab.mercurial-scm.org/D4806

util: use a context manager in readlock()

py3: convert os.readlink() path to native strings on Windows Windows insisted that it needs to be str. I skipped the stuff in the posix module, and left `tests/f` and `run-tests.py` alone for now.

py3: suppress the output from .write() calls in the remaining tests

py3: conditionalize json float precision difference in test-debugcommands.t

py3: byteify extension in test-debugcommands.t

pullreport: rev duplicated and extinct into account If we already have some obsolete and hidden nodes locally and the server send them again to you, it seems useful to point it out instead of being silent about it.

pullreport: issue a message about "extinct" pulled changesets Changeset pulled from a remote repository while already obsolete locally can end up hidden after the pull. Hiding obsolete changesets is a good behavior but silently "skipping" some of the pulled content can get confusing. We now detect this situation and emit a message about it. The message is simple and the wording could be improved, however, we focus on the detection here. Evolution is still an experimental feature, so the output is open to changes. In particular, we could point out at the latest successors of the obsolete changesets, however, it can get tricky is there are many of them. So we delay these improvements to another adventure. Another easy improvement would be to merge this message with the previous line about the new nodes and their phases. This is a good example of cases where we can only transmit a limited amount of data to users by default. We need some sort of "transaction journal" we could point the user to.