stringutil: add a new function to do minimal regex escaping Per https://bugs.python.org/issue29995, re.escape() used to over-escape regular expression strings, but in Python 3.7 that's been fixed, which also improved the performance of re.escape(). Since it's both an output change for us *and* a perfomance win, let's just effectively backport the new behavior to hg on all Python versions. Differential Revision: https://phab.mercurial-scm.org/D3841

graft: add no-commit mode (issue5631) This patch adds a new flag --no-commit in graft command. This feature grafts the changes but do not create commits for those changes, grafted changes will be added in the working directory. Also added tests to reflect the expected behavior. Differential Revision: https://phab.mercurial-scm.org/D2409

patchbomb: use email.mime.base instead of email.MIMEBase The later was removed on Python 3. On python 2: >>> email.MIMEBase.MIMEBase is email.mime.base.MIMEBase True Differential Revision: https://phab.mercurial-scm.org/D3836

patchbomb: use email.mime.multipart instead of email.MIMEMultipart The later was removed in Python 3. On python 2: >>> email.MIMEMultipart.MIMEMultipart is email.mime.multipart.MIMEMultipart True Differential Revision: https://phab.mercurial-scm.org/D3835

py3: add b'' prefixes in tests/test-bundle2-pushback.t This makes the test run on Python 3. # skip-blame because just b'' prefixes. Differential Revision: https://phab.mercurial-scm.org/D3834

py3: make tests/test-diff-antipatience.t work with python 3 On python3, if we do list(b'abcd'), we get [97, 98, 99, 100]. So this patch does the list() operation on unicodes and then convert things to bytes. This also adds `and None` to suppress return values of .write() calls. Differential Revision: https://phab.mercurial-scm.org/D3833