Sækja Python 3.8 3.8.2

Core and Builtins
- bpo-39382: Fix a use-after-free in the single inheritance path of issubclass(), when the __bases__ of an object has a single reference, and so does its first item. Patch by Yonatan Goldschmidt.
- bpo-39427: Document all possibilities for the -X options in the command line help section. Patch by Pablo Galindo.
Library
- bpo-39649: Remove obsolete check for __args__ in bdb.Bdb.format_stack_entry.
- bpo-39681: Fix a regression where the C pickle module wouldn’t allow unpickling from a file-like object that doesn’t expose a readinto() method.
- bpo-39546: Fix a regression in ArgumentParser where allow_abbrev=False was ignored for long options that used a prefix character other than “-“.
- bpo-39432: Implement PEP-489 algorithm for non-ascii “PyInit_…” symbol names in distutils to make it export the correct init symbol also on Windows.
Documentation
- bpo-17422: The language reference now specifies restrictions on class namespaces. Adapted from a patch by Ethan Furman.
- bpo-39572: Updated documentation of total flag of TypeDict.
- bpo-39654: In pyclbr doc, update ‘class’ to ‘module’ where appropriate and add readmodule comment. Patch by Hakan Çelik.
IDLE
- bpo-39663: Add tests for pyparse find_good_parse_start().