Original patch by Filip Gruszczyński.

New tests were added in test_metadata and old tests inherited from
distutils were still in test_dist, so I moved them into test_metadata
(except for one which was more at home in test_run) and merged
duplicates.

I also added some skips to lure contributors <wink>, optimized the
Metadata.update method a trifle, and added notes about a number of
issues.

A note: The tests in test_dist used to dump the Metadata objects to a
file in the METADATA format and look for strings in its contents; I
updated them to use the mapping API of Metadata instead.  For some
fields with special writing rules, I have added tests to ensure my
conversion did not lose anything.

I have tests to add in this file and it’s always nice to start from a
clean base.

Also fix some markup and typos.

atime and mtime with nanosecond precision on modern POSIX platforms.

configure.in: Set _POSIX_C_SOURCE to 200809L, instead of 200112L, to activate
features from IEEE Stds 1003.1-2008.

configure: Set _XOPEN_SOURCE to 700, instead of 600, to get POSIX 2008
functions on OpenBSD (e.g. fdopendir).

PyLong_AsDouble() and PyLong_AsUnsignedLongLong() now raise TypeError (rather
than SystemError) when passed a non-integer argument, matching the behavior of
all the other PyLong_As*() functions.

instead of void*

<sched.h> is available (most notably on OpenBSD when built without pthread):
add an explicit configure check.

Skip the test if the function is missing. Use U+0061 (a) instead of U+00E9 (é)
because U+00E9 raises a _curses.error('unget_wch() returned ERR') on some
buildbots. It's maybe because of the locale encoding.

 - Fix PyUnicode_AsWideCharString() doc: size doesn't contain the null
   character
 - Fix spelling of the null character

Fix also spelling of the null character.

Push a character so the next get_wch() will return it.

instead of the locale encoding

instead of the locale encoding.

instead of the locale encoding.

sys.platform is now always 'linux2' on Linux (even on Linux 3)

merge from 3.2. Fix closes Issue11155  - Correct the multiprocessing.Queue.put's arg (replace 'item' with 'obj') in the docs. Patch by Westley Martínez.

Fix closes Issue11155  - Correct the multiprocessing.Queue.put's arg (replace 'item' with 'obj') in the docs. Patch by Westley Martínez.

tarfile unnecessarily checked the existence of numerical user and group ids on
extraction. If one of them did not exist the respective id of the current user
(i.e. root) was used for the file and ownership information was lost. (Patch
by Sebastien Luttringer)

#12888: Fix a bug in HTMLParser.unescape that prevented it to escape more than 128 entities.  Patch by Peter Otten.