flush() was not called in close() if closefd=False.

docstrings.

Initial patch by Yuyang Guo.

overflows.  Added few missed PyErr_NoMemory().

module.  Original patch by Claudiu Popa.

when run as root.  Extended testing with /dev/full.
Based on patch by Daniel Dickman.

and email.test.

Patch by David Edelsohn.

the multiprocessing module.

posixpath.expandvars().  Fixed all os.path implementations on
unicode-disabled builds.

Fixes a regression in issue #22765.  Patch by Vinson Lee.

(currently only used for builds with <= 10.5 deployment targets)

values (like 0.9.8zc).

Used PyMem_New to check overflow.

are required.