bpo-43200: Fix link to shutil.copy() in the shutil doc (GH-24505)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
(cherry picked from commit 762fe7deed34a1d5294bf82071d318c8427b4893)

bpo-43204: Fix LibTomCrypt URL in md5module.c and sha*module.c comments (GH-24507)

Automerge-Triggered-By: GH:tiran
(cherry picked from commit 5ec7d535581bc99918e032891167a96abd224ed6)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>

bpo-43174: Windows: Use /utf-8 compiler option. (GH-24498)

(cherry picked from commit fedd86df2448370cdf62a229fd6f31dc92daf379)

Co-authored-by: Inada Naoki <songofacandy@gmail.com>

bpo-41824: Add versionadded for typing.ForwardRef docs (#24224) (#24493)

bpo-16781: In 'exec' doc, add 'nonlocal' to 'yield' and 'return' (GH-2446)

These 3 statements cannot be used at module scope -- nor in exec with one namespace.
(cherry picked from commit 0ec57e25c918b859b9f8d464e34e0ac859c2f8b3)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Simple typo fix (GH-24448)

(cherry picked from commit 5f18c223391eef8c7d01241b51a7b2429609dd84)

Co-authored-by: Andrew Tennikoff <atenni@users.noreply.github.com>

bpo-43132: Fix incorrect handling of PyObject_RichCompareBool() in _zoneinfo (GH-24450) (GH-24457)

PyObject_RichCompareBool() returns -1 on error, but this case is
not handled by the find_in_strong_cache() function.  Any exception
raised by PyObject_RichCompareBool() should be propagated.
(cherry picked from commit effaec0bb54f381db8ccfa62514bc26b00946b40)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>

bpo-35295: Remove outdated comment. (GH-24453)

(cherry picked from commit d938816acf71a74f1bd13fdf0534b3d9ea962e44)

Co-authored-by: Inada Naoki <songofacandy@gmail.com>

bpo-43102:  Set namedtuple __new__'s internal builtins to a dict. (GH-24439) (GH-24452)

build(deps): bump actions/upload-artifact from v2.2.1 to v2.2.2 (GH-24411)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from v2.2.1 to v2.2.2.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v2.2.1...e448a9b857ee2131e752b06002bf0e093c65e571)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
(cherry picked from commit aa4caf9887944ab280a87712460e2dd49b55fe5e)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

bpo-42773: fix tests not being run on pushes (GH-24004)

There was a typo, we were checking if the "GITHUB_BASE_REF" string
literal was empty instead of the $GITHUB_BASE_REF value. When
$GITHUB_BASE_REF is empty, the action that triggered the run was not a
pull request, so we always run the full test suite.

Signed-off-by: Filipe Laíns <lains@riseup.net>
(cherry picked from commit 4ac923f2756f835f512339ee181348cc535ab07f)

Co-authored-by: Filipe Laíns <lains@riseup.net>

Fix typo (GH-23019)

Fixed possible typo in comment
(cherry picked from commit bfe544d2f2c2e7a7c03a764bed3276a1e27a0f5c)

Co-authored-by: Harry <harry.lees@gmail.com>

bpo-43108: Fix a reference leak in the curses module (GH-24420)

(cherry picked from commit bb739ec922c6992a2be38f9fd3c544c2cc322dde)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>

bpo-43082: Remove redundant 'the' in Descriptor howto (GH-24394) (GH-24427)

Add link to Microsoft docs for limitations in Windows Store package (GH-24422)

(cherry picked from commit 1ba08a121a25fcf7c947d8d37e72e46dae59168c)

Co-authored-by: Steve Dower <steve.dower@python.org>

bpo-41748: Handles unquoted attributes with commas (GH-24072)

* bpo-41748: Adds tests for unquoted attributes with comma

* bpo-41748: Handles unquoted attributes with comma

* bpo-41748: Addresses review comments

* bpo-41748: Addresses review comments

* Adds more test cases
* Simplifies the regex for handling spaces

* bpo-41748: Moves attributes tests under the right class

* bpo-41748: Addresses review about duplicate attributes

* bpo-41748: Adds NEWS.d entry for this patch
(cherry picked from commit 9eb11a139fac5514d8456626806a68b3e3b7eafb)

Co-authored-by: Karl Dubost <karl+github@la-grange.net>

bpo-43016: Fix test_curses on platform without cursesw (GH-24405) (GH-24407)

(cherry picked from commit a1e9a1e120a11c563e166c15721169184c802f8b)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

bpo-42688: Fix ffi alloc/free when using external libffi on macos (GH-23868) (GH-23888)

Automerge-Triggered-By: GH:ronaldoussoren
(cherry picked from commit b3c77ecbbe0ad3e3cc6dbd885792203e9e6ec858)

Co-authored-by: erykoff <erykoff@stanford.edu>

bpo-42504: Ensure that get_config_var('MACOSX_DEPLOYMENT_TARGET') is a string (GH-24341) (GH-24410)

* bpo-42504: Ensure that get_config_var('MACOSX_DEPLOYMENT_TARGET') is a string
(cherry picked from commit 49926cf2bcc8b44d9b8f148d81979ada191dd9d5)

Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>

[3.9] bpo-41604: Don't decrement the reference count of the previous user_ptr when set_panel_usertpr fails (GH-21933). (GH-24403)

(cherry picked from commit 3243e8a4b4b4cf321f9b28335d565742a34b1976)

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>

[3.9] bpo-43016: Rewrite tests for curses (GH-24312). (GH-24399)

(cherry picked from commit d64fd4bb5bb4fd2e3277f39d3ad99b5a8d193e1b)

bpo-43083: Fix error handling in _sqlite3 (GH-24395)

(cherry picked from commit 9073180db521dc83e6216ff0da1479d00167f643)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

bpo-43030: Fixed a compiler warning in Py_UNICODE_ISSPACE with signed wchar_t (GH-24350)

(cherry picked from commit 42b1806af90b86ec393ca7da14e99ce95ec6c53b)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

bpo-43059: Remove reference to legacy external sqlite3 repository (GH-24364)

(cherry picked from commit e60344364245a23a7a1b25d5ebce6833652a656c)

Co-authored-by: L <3177243+LukeLR@users.noreply.github.com>

[doc] Document VIRTUAL_ENV environment variable (GH-21970)

(cherry picked from commit 3584d4b64a5373440f78237eac734831cfd83f79)

Co-authored-by: Andre Delfino <adelfino@gmail.com>

Fixing typos in turtle.rst (GH-24376)

Automerge-Triggered-By: GH:JulienPalard
(cherry picked from commit 6baaae589d596ed3bb668448f2a22c5f62fc5fdf)

Co-authored-by: Jules Lasne <jules.lasne@gmail.com>

Fixed typo in turtle.rst (GH-24371)

Found it while translating it to french 🤷

Automerge-Triggered-By: GH:JulienPalard
(cherry picked from commit 6372a4ceba126aa0a9f00eee0f8023308f13e77b)

Co-authored-by: Jules Lasne <jules.lasne@gmail.com>

bpo-43008: Add 'Patch by Ken Hilton' (GH-24370) (#24374)

(cherry picked from commit 11d75ec807f05eff1148c049e38b808d11c23b8a)
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

bpo-23544: Disable IDLE Stack Viewer when running user code (GH-17163)

Starting stack viewer when user code is running, including when Debugger is active, hangs or crashes IDLE.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
(cherry picked from commit 23a567c11ca36eedde0e119443c85cc16075deaf)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>

bpo-29076: Add fish support to macOS installer (GH-23302) (GH-23937)

(cherry picked from commit 7f162e867c674f57c308a87fffcdcca3540c8933)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>

bpo-42979: _zoneinfo exec function checks for PyDateTime_IMPORT failure (GH-24333) (GH-24351)

Importing datetime can fail.
(cherry picked from commit eeb701adc0fc29ba803fddf133d917ff45639a00)

Co-authored-by: Hai Shi <shihai1992@gmail.com>
Co-authored-by: Hai Shi <shihai1992@gmail.com>

bpo-43033: Fix the handling of PyObject_SetAttrString() in _zoneinfo.c (GH-24345) (GH-24349)

(cherry picked from commit 5327f370344a627f1578d8183d197feb286371c6)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>

bpo-43008: Make IDLE respect sys.excepthook (GH-24302)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
(cherry picked from commit 7a34380ad788886f5ad50d4175ceb2d5715b8cff)

Co-authored-by: Ken <kenny2minecraft@gmail.com>

[3.9] bpo-41841: Prepare IDLE NEWS for 3.9.2 (#GH-4343)

[3.9] bpo-42383: pdb: do not fail to restart the target if the current directory changed (GH-23412) (#24322)

[3.9] bpo-42384: pdb: correctly populate sys.path[0] (GH-23338) (#24321)

bpo-43013: Fix old tkinter module names in idlelib (GH-24326)

Lowercase 'tkColorChooser', 'tkFileDialog', 'tkSimpleDialog', and
'tkMessageBox' and remove 'tk'.  Just lowercase 'tkFont' as 'font'
is already used.  Adjust import.
(cherry picked from commit 879986d8a932c4524cb6ff822afc9537de16e28d)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

[3.9] bpo-33289: Return RGB triplet of ints instead of floats from tkinter.colorchooser (GH-6578). (GH-24318)

(cherry picked from commit 6713e869c4989c04318158b406c30a147ea52904)

Co-authored-by: Cheryl Sabella <cheryl.sabella@gmail.com>

bpo-43013: Update idlelib code to 3.x  (GH-24315)

Remove 9 remaining '(object)' occurrences in class headers in idlelib
and 25 '()' occurrences in idlelib.idle_test class headers.
(cherry picked from commit 8dfe15625e6ea4357a13fec7989a0e6ba2bf1359)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

closes bpo-43011: Fix DeprecationWarnings in test_ctypes (GH-24305)

(cherry picked from commit f7fa64f0e87edc61d990ed51b4da722906a10928)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>

bpo-40304: Correct type(name, bases, dict) doc (GH-19553)

Co-authored-by: Éric Araujo <merwok@netwok.org>
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
Co-authored-by: Tal Einat <532281+taleinat@users.noreply.github.com>
(cherry picked from commit 644d52818a6391535e5838fd57d58ffcb1163056)

Co-authored-by: Борис Верховский <boris.verk@gmail.com>

bpo-42780: Fix set_inheritable() for O_PATH file descriptors on Linux (GH-24172) (GH-24278)

(cherry picked from commit 7dc71c425cf6aa6a4070a418dce5d95ca435c79f)

bpo-42005: profile and cProfile catch BrokenPipeError (GH-22643)

(cherry picked from commit 3554fa4abecfb77ac5fcaa5ce8310eeca5683960)

Co-authored-by: Zhiming Wang <i@zhimingwang.org>

bpo-41995: Handle allocation failure in _tracemalloc and _zoneinfo (GH-22635)

(cherry picked from commit f1ff800db1f9fa5ff8f2fa2863796a46bfa9ee46)

Co-authored-by: Yunlongs <lylgood@foxmail.com>

closes bpo-42938: Replace snprintf with Python unicode formatting in ctypes param reprs. (GH-24247)

(cherry picked from commit 916610ef90a0d0761f08747f7b0905541f0977c7)

Co-authored-by: Benjamin Peterson <benjamin@python.org>
Co-authored-by: Benjamin Peterson <benjamin@python.org>

bpo-42944 Fix Random.sample when counts is not None (GH-24235) (GH-24243)

[3.9] bpo-42163, bpo-42189, bpo-42659: Support uname_tuple._replace (for all but processor) (GH-23010) (#24232)

* Add test capturing missed expectation with uname_result._replace.

* bpo-42163: Override uname_result._make to allow uname_result._replace to work (for everything but 'processor'.

* Replace hard-coded length with one derived from the definition.

* Add test capturing missed expectation with copy/deepcopy on namedtuple (bpo-42189).

* bpo-42189: Exclude processor parameter when constructing uname_result.

* In _make, rely on __new__ to strip processor.

* Add blurb.

* iter is not necessary here.

* Rely on num_fields in __new__

* Add test for slices on uname

* Add test for copy and pickle.

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
* import pickle

* Fix equality test after pickling.

* Simply rely on __reduce__ for pickling.

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
(cherry picked from commit a6fd0f414c0cb4cd5cc20eb2df3340b31c6f7743)

Co-authored-by: Jason R. Coombs <jaraco@jaraco.com>

bpo-42931: randbytes missing from random.__all__ (GH-24219) (GH-24225)

Docs: Remove stray semicolon in init.rst (GH-23974)

Removed stray semicolon which was causing the docs to render weirdly (it's the function right under the one [here](https://docs.python.org/3/c-api/init.htmlGH-c._PyInterpreterState_GetEvalFrameFunc)).
(cherry picked from commit 971235827754eee6c0d9f7d39b52fecdfd4cb7b4)

Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>

bpo-33065: Fix problem debugging user classes with __repr__ method (GH-24183)

If __repr__ uses instance attributes, as normal, and one steps
through the __init__ method, debugger may try to get repr before
the instance attributes exist.  reprlib.repr handles the error.
(cherry picked from commit 81f87bbf9f65702062021a78abd9b8f82c98a414)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

[3.9] bpo-42851: [Enum] remove brittle __init_subclass__ support (GH-24154) (GH-24155)

Solution to support calls to `__init_subclass__` with members defined is too brittle and breaks with certain mixins..
(cherry picked from commit a581a868d97f649aedf868a1d27865a10925c73a)

[3.9] bpo-42811: Update importlib.utils.resolve_name() docs to use __spec__.parent (GH-24100) (GH-24149)

This is a backport of
https://github.com/python/cpython/pull/24100

Automerge-Triggered-By: GH:brettcannon

bpo-38413: Remove outdated section about multithreading in sqlite3 (GH-23159)

(cherry picked from commit f9949f82e17c88609adb53eff3a7d5cd63a645bd)

bpo-42528: Improve the docs of most Py*_Check{,Exact} API calls (GH-23602) (GH-24139)

I think that none of these API calls can fail, but only few of them are
documented as such. Add the sentence "This function always succeeds" (which is
the same already used e.g. by PyNumber_Check) to all of them.
(cherry picked from commit 315fc52db17b19fe30aa9193f26adf69e18d8844)

Co-authored-by: Antonio Cuni <anto.cuni@gmail.com>
Co-authored-by: Antonio Cuni <anto.cuni@gmail.com>

bpo-14014: Clarify StreamWriter.reset() documentation (GH-13716)

(cherry picked from commit 1a9f51ed12feb4d95ad6d0faf610a030c05b9f5e)

Co-authored-by: Berker Peksag <berker.peksag@gmail.com>

bpo-42584: Update Windows installer to use SQLite 3.34.0 (GH-23675)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>

bpo-41837: Updated Windows installer to include OpenSSL 1.1.1i (GH-24125)

[3.9] bpo-42584: Update macOS installer to use SQLite 3.34.0 (GH-23674) (GH-24130)

(cherry picked from commit c94ee13ad596d26d1859078bc09806aa59bb0000)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
Automerge-Triggered-By: GH:ned-deily

[3.9] bpo-40052: Fix alignment issue in PyVectorcall_Function() (GH-23999) (GH-24005)

```
In file included from /usr/include/python3.8/Python.h:147:
In file included from /usr/include/python3.8/abstract.h:837:
/usr/include/python3.8/cpython/abstract.h:91:11: error: cast from 'char *' to 'vectorcallfunc *'
(aka 'struct _object *(**)(struct _object *, struct _object *const *, unsigned long, struct _object *)')
increases required alignment from 1 to 8 [-Werror,-Wcast-align]

    ptr = (vectorcallfunc*)(((char *)callable) + offset);
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
```
Co-authored-by: Petr Viktorin <encukou@gmail.com>
Co-Authored-By: Andreas Schneider <asn@cryptomilk.org>
Co-Authored-By: Antoine Pitrou <antoine@python.org>
(cherry picked from commit 056c08211b402b4dbc1530a9de9d00ad5309909f)

[3.9] bpo-42681: Fix test_curses failures related to color pairs (GH-24089) (GH-24113)

On ncurses 6.1 pair numbers are limited by SHORT_MAX-1.

Improve error reporting and tests for color functions.
(cherry picked from commit 59f9b4e4509be67494f3d45489fa55523175ff69)

[3.9] bpo-32631: IDLE: Enable zzdummy example extension module (GH-14491)

Make menu items work with formatter, add docstrings, add 100% tests.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
(cherry picked from commit e40e2a2cc94c554e7e245a8ca5a7432d31a95766)

Co-authored-by: Cheryl Sabella <cheryl.sabella@gmail.com>

Fix broken NEWS markup (GH-24110)

(cherry picked from commit cde988e893793f58bf87e7a8c014926fd2e32904)

Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>

bpo-40810: Fix CheckTraceCallbackContent for SQLite pre 3.7.15 (GH-20530)

Ref. [SQLite 3.7.15 changelog](https://sqlite.org/changes.htmlGH-version_3_7_15):
_"Avoid invoking the sqlite3_trace() callback multiple times when a statement is automatically reprepared due to SQLITE_SCHEMA errors."_
(cherry picked from commit f7f0ed59bcc41ed20674d4b2aa443d3b79e725f4)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>

Do not remove x bit from published directories (GH-24101)

(cherry picked from commit af4cd16479f2d55bee3db899e7679d7cde1d2ab7)

Co-authored-by: Steve Dower <steve.dower@python.org>

Revert "[3.9] [doc] Fix erroneous backslashes in signatures and names (GH-23658)" (GH-24092)

This partially reverts commit
e89993cff4e60fcf32643fc613d0544f3dbcd98a, which was removing
backslashes in documentations compiled with Sphinx < 3, used for
Python 3.8 and 3.9 docs.

bpo-42692: fix __builtin_available check on older compilers (GH-23873) (GH-24090)

A compiler that doesn't define `__has_builtin` will error out when it is
used on the same line as the check for it.

Automerge-Triggered-By: GH:ronaldoussoren
(cherry picked from commit df21f502fdccec234282bf0a211af979fd23def4)

Co-authored-by: Joshua Root <jmr@macports.org>

bpo-41837: Update macOS installer build to use OpenSSL 1.1.1i. (GH-24080) (GH-24083)

(cherry picked from commit 14097a2785414c728d41d8d730a469a8c46ecdb9)

Co-authored-by: Ned Deily <nad@python.org>

Update Sphinx version for macOS installer build. (GH-24082) (GH-24087)

(cherry picked from commit 0f3b96b368dd7ebb5dcd3759a30322dbd027f292)

Co-authored-by: Ned Deily <nad@python.org>

bpo-42361: Update macOS installer build to use Tcl/Tk 8.6.11 (GH-24081)

As of 2021-01-03, Tcl/Tk 8.6.11rc2 is expected to be the final release.
(cherry picked from commit a38e04b566879a5040ea97428d7ee4331d76513f)

Co-authored-by: Ned Deily <nad@python.org>

[3.9] bpo-42681: Fix range checks for color and pair numbers in curses (GH-23874). (GH-24077)

(cherry picked from commit 1470edd6131c29b8a09ce012cdfee3afa269d553)

[3.9] bpo-42789: Don't skip curses tests on non-tty. (GH-24009) (GH-24076)

If __stdout__ is not attached to terminal, try to use __stderr__
if it is attached to terminal, or open the terminal device, or
use regular file as terminal, but some functions will be untested
in the latter case.
(cherry picked from commit 607501abb488fb37e33cf9d35260ab7baefa192f)

[3.9] bpo-42806: Fix ast locations of f-strings inside parentheses (GH-24067) (GH-24069)

(cherry picked from commit bd2728b1e8a99ba8f8c2d481f88aeb99b8b8360f)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>

[3.9] bpo-40631: Disallow single parenthesized star target (GH-24027) (GH-24068)

(cherry picked from commit 2ea320dddd553298038bb7d6789e50e199332f66)

Automerge-Triggered-By: GH:pablogsal

bpo-42809: Improve pickle tests for recursive data. (GH-24060)

(cherry picked from commit a25011be8c6f62cb3333903befe6295d57f0bd30)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

[3.9] bpo-42425: Fix possible leak in initialization of errmap for OSError (GH-23446). (GH-24057)

(cherry picked from commit ed1007c0d74e658d1e6c9b51b12ce7501eb8cbf9)

[3.9] bpo-42756: Configure LMTP Unix-domain socket to use global default timeout when timeout not provided (GH-23969) (GH-24050)

bpo-39068: Fix race condition in base64 (GH-17627)

There was a race condition in base64 in lazy initialization of multiple globals.
(cherry picked from commit 9655434cca5dfbea97bf6d355aec028e840b289c)

Co-authored-by: Brandon Stansbury <brandonrstansbury@gmail.com>

Bring Python into the new year. (GH-24036)

(cherry picked from commit de6f20a6de48d63066b2cf5b317f50629f01d74a)

Co-authored-by: Dong-hee Na <donghee.na@python.org>

bpo-42794: Update test_nntplib to use offical group name for testing (GH-24037)

(cherry picked from commit ec3165320e81ac87edcb85c86c452528ddbaec1c)

Co-authored-by: Dong-hee Na <donghee.na@python.org>

bpo-42781: Document the mechanics of cached_property from a user viewpoint (GH-24031) (#24035)

Fixes a typo in importlib.metadata. (GH-23921) (#24029)

Signed-off-by: Tao He <sighingnow@gmail.com>
(cherry picked from commit 3631d6deab064de0bb286ef2943885dca3c3075e)

Co-authored-by: Tao He <sighingnow@gmail.com>
Co-authored-by: Tao He <sighingnow@gmail.com>

[3.9] bpo-41224: Add versionadded for Symbol.is_annotated (GH-23861). (GH-24017)

(cherry picked from commit 2edfc86f69d8a74f4821974678f664ff94a9dc22)

bpo-42655: Fix subprocess extra_groups gid conversion (GH-23762)

(cherry picked from commit 0159e5efeebd12b3cf365c8569ca000eac7cb03e)

Co-authored-by: Jakub Kulík <Kulikjak@gmail.com>

bpo-42700: Swap descriptions in pyexpat.errors (GH-23876)

The descriptions of the `codes` and `messages` dictionaries in
`xml.parsers.expat.errors` were swapped, and this commit swaps them
back. For example, `codes` maps string descriptions of errors to numeric
error codes, not the other way around.
(cherry picked from commit 84402eb11086f97d31164aaa23e7238da3464f41)

Co-authored-by: Michael Wayne Goodman <goodman.m.w@gmail.com>

Allow / character in username,password fields in _PROXY envvars. (GH-23973)

(cherry picked from commit 030a713183084594659aefd77b76fe30178e23c8)

Co-authored-by: Senthil Kumaran <senthil@uthcode.com>

[doc] Fix missing commas in signatures (GH-23693)

* Fix star in signatures

* Fix comma in signatures
(cherry picked from commit 60eccd095624f39195cc5ae0b49a59022bbbb028)

Co-authored-by: Andre Delfino <adelfino@gmail.com>

bpo-16396: fix BPO number in changelog (GH-23951) (GH-23956)

Automerge-Triggered-By: GH:jaraco
(cherry picked from commit 7865f516f313bd31ca48ee1fdae2a80add2293b6)

Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>

bpo-42759: Fix equality comparison of Variable and Font in Tkinter (GH-23968)

Objects which belong to different Tcl interpreters are now always
different, even if they have the same name.
(cherry picked from commit 1df56bc0597a051c13d53514e120e9b6764185f8)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

bpo-42749: Use dynamic version to test for unsupported bignum in Tk (GH-23966)

Tk can internally support bignum even if Tkinter is built without
support of bignum.
(cherry picked from commit 156b7f7052102ee1633a18e9a136ad8c38f66db0)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

bpo-42770: Fix a typo in the email.headerregistry docs (GH-23982)

Automerge-Triggered-By: GH:zware
(cherry picked from commit c56988b88fecf6dc70f039704fda6051a0754db1)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>

bpo-42740: Fix get_args for PEP 585 collections.abc.Callable (GH-23963)

PR 1/2. Needs backport to 3.9.
(cherry picked from commit 4140f10a16f06c32fd49f9e21fb2a53abe7357f0)

Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>

bpo-42755: Fix sqlite3.Connection.backup docs (GH-23965)

The `pages` argument default value now reflects the implementation.
(cherry picked from commit abba83b4b91f78dc556dc0b7700ecb46cba22c01)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>

bpo-42749: Fix testing bignum if Tkinter is compiled with Tk 8.4 and dynamic linked with Tk >= 8.5 (GH-23955)

(cherry picked from commit b02ad2458bc127a7afdeef414fa68c9a7f1f32af)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

Add convolve() to the itertools recipes (GH-23928) (GH-23949)

Rename Tkinter tests for widget options (GH-23944)

Every test for widget option starts now with "test_configure_"
to distinguish it from tests for widget commands.
(cherry picked from commit c1ae21c965cb4d0566df2095e4bcb274d0bd9353)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

bpo-42727: [Enum] use super() and include **kwds (GH-23927)

for multiple inheritance support:

use super().new
pass **kwds to super().new
(cherry picked from commit 786d97a66cac48e7a933010367b8993a5b3ab85b)

Co-authored-by: Ethan Furman <ethan@stoneleaf.us>

bpo-42734: Fix crasher bogus_code_obj.py (GH-23939)

It did not work because the signature of code object constructor
was changed. Also, it used old format of bytecode (pre-wordcode).
(cherry picked from commit 954a7427ba9c2d02faed32c02090caeca873aeca)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

bpo-42388: Fix subprocess.check_output input=None when text=True (GH-23467)

When the modern text= spelling of the universal_newlines= parameter was added
for Python 3.7, check_output's special case around input=None was overlooked.
So it behaved differently with universal_newlines=True vs text=True.  This
reconciles the behavior to be consistent and adds a test to guarantee it.

Also clarifies the existing check_output documentation.

Co-authored-by: Alexey Izbyshev <izbyshev@ispras.ru>
(cherry picked from commit 64abf373444944a240274a9b6d66d1cb01ecfcdd)

Co-authored-by: Gregory P. Smith <greg@krypto.org>

bpo-42727: Fix the NEWS entry .rst (GH-23932)

It was causing CI failures.  the offending file came from https://github.com/python/cpython/pull/23917

```
python3 tools/rstlint.py ../Misc/NEWS.d/next/
[2] ../Misc/NEWS.d/next/Library/2020-12-23-19-43-06.bpo-42727.WH3ODh.rst:1: default role used
[2] ../Misc/NEWS.d/next/Library/2020-12-23-19-43-06.bpo-42727.WH3ODh.rst:2: default role used
2 problems with severity 2 found.
Makefile:204: recipe for target 'check' failed
```
(cherry picked from commit 8badadec53cbf9dc049c5b54198c5689481e3f3f)

Co-authored-by: Gregory P. Smith <greg@krypto.org>

[3.9] bpo-42727: [Enum] EnumMeta.__prepare__ now accepts **kwds (GH-23917). (GH-23926)

* [3.9] [Enum] EnumMeta.__prepare__ now accepts **kwds (GH-23917).
(cherry picked from commit 6ec0adefad60ec7cdec61c44baecf1dccc1461ab)