compiler warnings in the Modules/ subdirectory.

warnings in the Objects/ subdirectory.

PyType_FromSpecWithBases() and PyType_FromSpec() now reject explicitly negative
slot identifiers.

warnings in the Python/ subdirectory.

changes that were only merged into demohelp.txt, and re-delete demohelp.txt.

Will forward port 22095 changes separately.

some __sizeof__() methods.

some __sizeof__() methods.

the FileCompareTestCase.test_matching test.

Patch by Steven Barker.

the FileCompareTestCase.test_matching test.

Patch by Steven Barker.

in the mailbox module.  This is partial rollback of changeset f340cb045bf9.

in the mailbox module.  This is partial rollback of changeset f340cb045bf9.

Original patch by Raymond Hettinger.

Original patch by Raymond Hettinger.

AIX.  Based on patch by Delhallt.

AIX.  Based on patch by Delhallt.

asyncio.async(coro), mention that asyncio.async() can be used to scheduler a
coroutine, and make it clear that create_task() is only available in Python
3.4.2 and later.

Patch written by Xavier de Gaye.

Patch from Stefan Krah.

Patch by Milan Oberkirch, developed as part of his 2014 GSOC project.

Note that this also fixes a bug in mock_socket ('getpeername' was returning a
simple string instead of the tuple required for IPvX protocols), a bug in
DebugServer with respect to handling binary data (should have been fixed when
decode_data was introduced, but wasn't found until this patch was written),
and a long-standing bug in DebugServer (it was printing an extra blank line at
the end of the displayed message text).