The test does crash on multiple CIs causing many troubles. For
example, the test prevents to get results of the two Refleak 3.x
buildbots.

The cancellation of an overlapped WSARecv() has a race condition
which causes data loss because of the current implementation of
proactor in asyncio.

No longer cancel overlapped WSARecv() in _ProactorReadPipeTransport
to work around the race condition.

Remove the optimized recv_into() implementation to get simple
implementation of pause_reading() using the single _pending_data
attribute.

Move _feed_data_to_bufferred_proto() to protocols.py.

Remove set_protocol() method which became useless.

A few wording improvements to dict ordering documentation.

Followup to 4705ea38c900f068fd262aca02943896d1123544 and bpo-33778.

* bpo-33274: Compliance with DOM L1: return removed attribute

* Update 2018-06-06-22-01-33.bpo-33274.teYqv8.rst

Also, standardize indentation of generated tables.

Fix "<CoroWrapper ...> was never yielded from" warning in
PyTask_PyFuture_Tests.test_error_in_call_soon() of
test_asyncio.test_tasks.

Close manually the coroutine on error.

Hide PendingDeprecationWarning in test__register_task_3().

* Close sockets and streams to fix ResourceWarning warnings
* Catch also OSError to hide a traceback on an expected handshake
  error

Document that the default value of repeat changed from 3 to 5 in
Python 3.7.

Substract one because listdir() opens internally a file
descriptor to list the content of the /proc/self/fd/ directory.

Add test_support.test_fd_count().

Move also MAXFD code before msvcrt.CrtSetReportMode(), to make sure
that the report mode is always restored on failure.

Move the floor() call into fbound() to call floor() on a double
rather than an int. The change should enhance the rounding.

Document also (int)double rounding mode.

an => and

The bug has been fixed 10 months ago:

* https://svnweb.freebsd.org/base?view=revision&revision=321920
* https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221048

With 3.7+, dictionary are ordered by design.  Configparser still uses
collections.OrderedDict, which is unnecessary.  This updates the module
to use the standard dict implementation by default, and changes the
docs and tests to match.

It wasn't testing functionality.  Now it is (on Linux anyways).

* Document tokenize.generate_tokens()

* Add news file

* Add test for generate_tokens

* Document behaviour around ENCODING token

* Add generate_tokens to __all__

testModeStrings and testTruncateOnWindows were depended on
a file leaked in other tests.

Also improve cleaning up after tests.

With addCleanup() f.close() was executed after tearDown().

In addition to that, mark SSLTransport as "closed" in its "abort()" method to prevent bogus warnings.

Raise TypeError instead of SystemError for unsupported operations.

Previously, the mouse wheel and scrollbar slider moved text by a fixed
number of pixels, resulting in partial lines at the top of the editor
box. The change also applies to the shell and grep output windows,
but not to read-only text views.

* Fix AttributeError (not all SSL exceptions have 'errno' attribute)

* Increase default handshake timeout from 10 to 60 seconds
* Make sure start_tls can be cancelled correctly
* Make sure any error in SSLProtocol gets propagated (instead of just being logged)