(part of #10735)

Try this again, hopefully the right way this time.

Arfrever Taifersar Arahesis reported that test_compileall failed during Gentoo
install because it was tyring to write .pyc files to a read-only system
directory during test_no_args_compiles_path.  Having the tests call python
with -S should eliminate the system directories from the path.

Surprisingly, it turns out there was no test that exercised this code path.

Arfrever Taifersar Arahesis reported that test_compileall failed during Gentoo
install because it was tyring to write .pyc files to a read-only system
directory during test_no_args_compiles_path.  Having subprocess call python
with -S should eliminate the system directories from the path.

#6075: make idle work with both Carbon AquaTk and Cocoa AquaTk. Patch by Kevin Walzer and Ned Deily.

Issue 10611. Issue 9857. Improve the way exception handling, including test skipping, is done inside TestCase.run

#10573: use actual/expected consistently in unittest methods. The order of the args of assertCountEqual is also changed.

Such addresses are not RFC compliant except under the 'obsolete syntax'
rules, but before this fix the whitespace was dropped from the input,
concatenating the pieces.  That breaks one of the principles of the
email package, that of preserving the input as much as possible.
It also denies the application program the opportunity to apply its
own heuristics to interpretation of such non-compliant addresses.

It is possible users of the email package were depending on the local
part always being a single token, so this fix will not be backported.

This provides access to the context menus where they previously could
not be accessed due to the way OSX Tk binds buttons.  It also
improves platform consistency.

Patch by Ned Deily.

Add subparser aliases for argparse. Resolves issue 9324. Approved by Georg for beta2 on the tracker.