Issue 1294232: Fix errors in metaclass calculation affecting some cases of metaclass inheritance. Patch by Daniel Urban.

exceptions, when a document with timestamp earlier than 1980 is provided to
zipfile. Patch contributed by  Petri Lehtinen.

semicolons. Patch by Ben Darnell and Petri Lehtinen.

generator.throw() now gets the traceback from the passed exception's
`__traceback__` attribute.  Patch by Petri Lehtinen.

  in order to display the prompt correctly.  Patch by Petri Lehtinen.

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)