correct static string clearing loop (closes #16906)
#16852: test_genericpath, test_posixpath, test_ntpath, and test_macpath now work with unittest test discovery.  Patch by Zachary Ware.
Use correct methods in unittest.mock examples.
#16897: test_bisect now works with unittest test discovery.  Initial patch by Zachary Ware.
#16896: test_asyncore now works with unittest test discovery.  Patch by Zachary Ware.
#16888: test_array now works with unittest test discovery.  Patch by Zachary Ware.
#16898: test_bufio now works with unittest test discovery.  Patch by Zachary Ware.
#16905: test_bufio now works with unittest test discovery.  Initial patch by Berker Peksag.
#16910: test_bytes, test_unicode, and test_userstring now work with unittest test discovery.  Patch by Zachary Ware.
Issue #16076: make _elementtree.Element pickle-able in a way that is compatible
with the Python version of the class.

Patch by Daniel Shahaf.
normalize whitespace