Issue #13194: zlib.compressobj().copy() and zlib.decompressobj().copy() are now available on Windows.

The nti() function that converts a number field from a tar header to a number
failed to decode GNU tar specific base-256 fields. I also added support for
decoding and encoding negative base-256 number fields.

instead of the locale encoding.

wcsftime() doesn't format time zone correctly.

Also fix the bz2 module, whose classes used the same algorithm.

Patch by Justin Love.

(found by Georg)

I tested this manually; it would be great to have buildbots using
installed Pythons, including Pythons configured with different prefix
and exec-prefix.

Reported by Zsolt Cserna.

Patch by Jeff Ramnani.  Tested with -B, -O and -OO.

Patch by Hallvard B Furuseth.

Found by Franz Glasner in #2504.

  with line feeds.  This was ported from the sandbox to the 3.3 branch, but
  didn't make it into 3.2.

- Re-enable lib2to3's test_parser.py tests, though with an expected failure
  (see issue 13125).

as "The pipe is being closed") is now mapped to POSIX errno EPIPE
(previously EINVAL).

contents cannot be read.

an unreadable directory.

new test cases for importing bad packages and unreadable packages dirs.

This introduces a small private API for this common pattern.
The issue has been discovered thanks to Martin's huge-mem buildbot.