compat: back out a25343d16ebe (initialize LC_CTYPE locale on all Python ...) As Yuya Nishihara pointed out, setting LC_CTYPE changes the behavior of some str methods on Python 2.

curses: back out d2227d4c9e6b (do not initialize LC_ALL to user settings) The changeset was based on a25343d16ebe, which will be backed out, too. Another fix for the problem will be resubmitted to the stable branch.

test: redirect stderr so warning messages don't change output (issue6237) clone and commit race for the lock, and if commit has to wait more than a second it prints a warning to stderr. Since this is somewhat expected here, silence it. Differential Revision: https://phab.mercurial-scm.org/D8664

locks: expect repo lock, not wlock, when writing to .hg/strip-backup/ There should be no need for a working copy lock when creating (or reading) bundles in `.hg/strip-backup/` since they don't affect the working copy. I noticed this because we have an extension that tries to strip some revisions while holding only a repo lock. I guess we have no such cases in core, which seems a bit surprising. Maybe we always take a wlock at a higher level so the working copy is not updated while the target commit is being stripped. Differential Revision: https://phab.mercurial-scm.org/D8666

graft: leverage cmdutil.check_incompatible_arguments() for --abort/--stop Differential Revision: https://phab.mercurial-scm.org/D8669

run-tests: fix escapes with conditions Before this fix, escapes with conditions in tests failed like this on Python 3: $ $PYTHON -c 'from mercurial.utils.procutil import stdout; stdout.write(b"\xff")' - \xff (no-eol) (esc) (true !) + \xff (no-eol) (esc) The unicode_escape encoding decodes br'\xff' to u'\xff'. To convert the first 256 code points to bytes with the same ordinal, the latin-1 encoding must be used. Escapes without conditions already worked before on Python 3, but not through `el == l` a few lines below the changed line in run-tests.py. I didn’t investigate further.