Patch by Jonathan Hosmer.

Note that the email version string in 3.3 and 3.4 is inaccurate, since it
still exists but wasn't updated while the code was.

Oleg Oshmyan.

Patch by Anastasia Filatova.

Patch by Joshua Moore-Oliva.

Also fixed the phrasing in a comment.

used in the with statement in generator.

Patch by Terry Chia.

vestigial Makefile step.

directory attributes.

to AbstractTestZip64InSmallFiles.

records if allowZip64 is false.

Patch by Raúl Cumplido.

but fixing it now means the test suite can have zero errors
during the next two weeks.

return Unicode strings on Python 3.

module.

Issue #21332: Ensure that ``bufsize=1`` in subprocess.Popen() selects line buffering, rather than block buffering.

AttributeError when sys.stderr is None.

Since EmailMessage is a provisional API we can fix API bugs in a
maintenance release, but I used a trick suggested by Serhiy to
maintain backward compatibility with 3.4.0/1.