Patch by Alex Gaynor with some modifications by me.

and above.  Patch by Tim Graham.

and above.  Patch by Tim Graham.

Issue #22335: Fix crash when trying to enlarge a bytearray to 0x7fffffff bytes on a 32-bit platform.

Issue #22335: Fix crash when trying to enlarge a bytearray to 0x7fffffff bytes on a 32-bit platform.

#22751: fix test___all__ warning about modified environment in the tests.  Patch by Michael Cetrulo.

When running tests in subprocesses with the regrtest -j option, a bug
in Cocoa Tk can result in a Tcl segfault.  Avoid the problem by forcing
Tk to fully initialize as an OS X gui process before destroying the
Tcl instance and creating another. (Original patch by Serhiy Storchaka)