Fix test_socket.SendmsgSCTPStreamTest: catch ENOMEM error.
testSendmsgTimeout() and testSendmsgDontWait() randomly fail on
Travis CI with: "OSError: [Errno 12] Cannot allocate memory".

https://bugs.python.org/issue32557

The GlobalLock() call in UpdateDropDescription() was not checked for
failure.



https://bugs.python.org/issue34770

Also point to start of tokens in parsing errors.

Fixes bpo-34683

The xml.sax and xml.dom.domreg modules now obey
sys.flags.ignore_environment.
Signed-off-by: Christian Heimes <christian@python.org>



https://bugs.python.org/issue34791

Make sure that "./python script.py" does not crash if the script
file doesn't exist.

https://bugs.python.org/issue34582

* Insert the warn in the asyncio.sleep when the loop argument is used

* Insert the warn in the asyncio.wait and asyncio.wait_for when the loop argument is used

* Better format of the code

* Add news file

* change calls for get_event_loop() to calls for get_running_loop()

* Change message to be more clear in News

* Improve the comments in test_tasks

https://bugs.python.org/issue34548

The SAX parser no longer processes general external entities by default
to increase security. Before, the parser created network connections
to fetch remote files or loaded local files from the file system for DTD
and entities.
Signed-off-by: Christian Heimes <christian@python.org>



https://bugs.python.org/issue17239

Add SSLContext.post_handshake_auth and
SSLSocket.verify_client_post_handshake for TLS 1.3 post-handshake
authentication.

Signed-off-by: Christian Heimes <christian@python.org>q


https://bugs.python.org/issue34670

Use "backslashreplace" instead of "unicode-escape".  It is not
implementation depended and escapes only non-encodable characters.

Also simplify the code.

News entry clean up, added to what's new

Requested by @gvanrossum in https://github.com/python/cpython/pull/4509 


https://bugs.python.org/issue32117

Also make docs for NEWFALSE and NEWTRUE more consistent
with docs for other opcodes.

OpenSSL follows the convention that whenever you call a function, it
returns an error indicator value; and if this value is negative, then
you need to go look at the actual error code to see what happened.

Commit c6fd1c1c introduced a small mistake in
_ssl__SSLSocket_shutdown_impl: instead of checking whether the error
indicator was negative, it started checking whether the actual error
code was negative, and it turns out that the error codes are never
negative. So the effect was that 'unwrap()' lost the ability to raise
SSL errors.


https://bugs.python.org/issue34759

https://bugs.python.org/issue34623

* bpo-29577: allow multiple mixin classes

Iterable unpacking is now allowed without parentheses in yield and return
statements, e.g. ``yield 1, 2, 3, *rest``. Thanks to David Cuthbert for the
change and jChapman for added tests.

We cannot simply call locale.getpreferredencoding() here,
as GDB might have been linked against a different version
of Python with a different encoding and coercion policy
with respect to PEP 538 and PEP 540.

Thanks to Victor Stinner for a hint on how to fix this.

PowerShell Core 6.1 is the cross-platform port of Windows PowerShell. This change updates Activate.ps1 to not make Windows assumptions as well as installing it into the bin/Scripts directory on all operating systems.

Requires PowerShell Core 6.1 for proper readline support once the shell has been activated for the virtual environment.

Make it more accurate and not limited to UNIX.