Patch by Neil Schemenauer, minimally modified.

(it was wrongly classified in the pending calls test case)

It creates a refleak in subinterpreters, as atexit callbacks aren't triggered at their end.

when extensions are registered. Patch by Paul Moore.

  version again on Darwin.

a drive root on Windows. Original patch by Atsuo Ishimoto.

'mode' docs fix: the file must always be opened in binary in Python3.

Bug in Wave_write.close: when the close method calls the check that the header
exists and it raises an error, the _file attribute never gets set to None, so
the next close tries to close the file again and we get an ignored traceback
in the __del__ method.  The fix is to set _file to None in a finally clause.
This represents a behavior change...in theory a program could be checking for
the error on close and then doing a recovery action on the still open file and
closing it again.  But this change will only go into 3.4, so I think that
behavior change is acceptable given that it would be pretty weird and unlikely
logic to begin with.

    warning: 'utime.mtime_ns' may be used uninitialized in this function [-Wmaybe-uninitialized]

    warning: 'utime.mtime_ns' may be used uninitialized in this function [-Wmaybe-uninitialized]

Issue #18214: Improve finalization of Python modules to avoid setting their globals to None, in most cases.

Issue #15699: The readline module now uses PEP 3121-style module initialization, so as to reclaim allocated resources (Python callbacks) at shutdown.
Original patch by Robin Schreiber.

Feature and tests by ClClaudiu.Popa, I added the doc changes.

gcov is great.

CID 1058763

"coverage-report" creates an instrumented Python build, runs unit tests
and creates a HTML. The report can be updated with "make coverage-lcov".

Patch by Sijin Joseph.