Also add an explicit test for safe implementation usage on supported platforms.

As a side effect, this commit adds a module-level attribute 'rmtree_is_safe'
which offers introspection whether the current rmtree implementation is safe
against symlink attacks.

to override environment variables.

Issue #15142: Fix reference leak when deallocating instances of types created using PyType_FromSpec().

Issue #12965: Clean up C-API docs for PyLong_AsLongLong(AndOverflow); clarify that __int__ will be called for non-PyLongs

It is used automatically on platforms supporting the necessary os.openat() and
os.unlinkat() functions. Main code by Martin von Löwis.

(patch by Serhiy)

#15114: the strict mode of HTMLParser and the HTMLParseError exception are deprecated now that the parser is able to parse invalid markup.

Issue #15142: Fix reference leak when deallocating instances of types created using PyType_FromSpec().

Patch by Serhiy Storchaka.

Try to fix shutil.which() tests on Windows by fixing a typo introduced in 27f9c26fdd8b in posix_access().

Close #15153: Added inspect.getgeneratorlocals to simplify whitebox testing of generator state updates

Issue #12965: Clean up C-API docs for PyLong_AsLong(AndOverflow); clarify that __int__ will be called for non-PyLongs

Issue #14742: test_unparse now only checks a limited number of files unless the 'cpu' resource is specified.