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

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

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.

Many functions now support "dir_fd" and "follow_symlinks" parameters;
some also support accepting an open file descriptor in place of of a path
string.  Added os.support_* collections as LBYL helpers.  Removed many
functions only previously seen in 3.3 alpha releases (often starting with
"f" or "l", or ending with "at").  Originally suggested by Serhiy Storchaka;
implemented by Larry Hastings.

Patch by Yury Selivanov.