Close #19396: make test_contextlib tolerate -S
Close #19339: telnetlib module is now using time.monotonic() when available to
compute timeout.
(Merge 3.3) Close #19339: telnetlib module is now using time.monotonic() when
available to compute timeout.
Move Misc/NEWS entries in correct secton.
Issue #18685: Restore re performance to pre-PEP 393 levels.
Close #19330 by using public classes in contextlib

- added test cases to ensure docstrings are reasonable
- also updates various comments in contextlib for accuracy
- identifed #19404 as an issue making it difficult to provide
  good help output on generator based context manager instances
Issue #18685: Extract template part of _sre.c into separated sre_lib.h file.
Issue #15663: OS X installer builtin Tcl/Tk support

Make it easier for users to make use of the backup _tkinter linked
with the third-party Tcl and Tk frameworks in /Library/Frameworks.
The two tkinter variants are now installed in separate directories
under a new lib-tkinter.  This allows per-user selection by
manipulating sys.path, directly or with PYTHONPATH.  If this
proves useful, we can supply a more convenient user interface
to supply the paths.  For now, this remains somewhat experimental.
Issue #15663: OS X installer builtin Tcl/Tk support

Make it easier for users to make use of the backup _tkinter linked
with the third-party Tcl and Tk frameworks in /Library/Frameworks.
The two tkinter variants are now installed in separate directories
under a new lib-tkinter.  This allows per-user selection by
manipulating sys.path, directly or with PYTHONPATH.  If this
proves useful, we can supply a more convenient user interface
to supply the paths.  For now, this remains somewhat experimental.
null merge