#8473: Add tests that doctest uses universal newlines in testfile.

Python3 does not have the bug covered by the issue.
Merge: #8473: Add tests that doctest uses universal newlines in testfile.
Closes #22540: speed up PyObject_IsInstance and PyObject_IsSubclass in the common case that the second argument has metaclass "type".
Make test_datetime a better citizen (issue #22540)
faulthandler: enhance dump_ascii() to escape also non-printable ASCII
characters (U+0000..U+001f and U+007f).
#12780: update inspect test skipIf for PEP 3147.

The test needs to be skipped if unicodedata is either part of the
main binary (a repackaging of cpython on Windows?) or has python
source (pypy?).  PEP 3147 makes __file__ point to the .py source,
so we need to change the extension check from looking for the
old .pyc/.pyo to just looking for .py.

Note that this skip should never trigger on CPython itself, so
one could argue it should be dropped instead.  But since it exists,
why risk breaking someone else's python.
Merge: #12780: update inspect test skipIf for PEP 3147.
Fix a few typo/grammar issues in the multiprocessing docs.

Reported by Scott Hinton on docs@.
Merge with 3.4
#22508: Drop email __version__ string.  It no longer means anything.

A debian code search (by Tshepang Lekhonkhobe) turned up only one package
checking email.__version__...and it was the 2.7-only mailman package.  Since
Barry approves this change, it seems safe enough to make it...