Correct Profile class usage example. Addresses issue #18033 .
Patch contributed by Olivier Hervieu and Dmi Baranov.
Closes issue 14971.
 unittest test discovery no longer gets confused when a function
has a different __name__ than its name in the TestCase class dictionary.
Fix the dead link of IEEE_854-1987 standard with the Wikipedia entry.
Addresses issue #18438
Fixed tests with Tcl/Tk <8.5 (closes #18964).
Fix a typo. (closes #18953)