Issue #17278: Fix a crash in heapq.heappush() and heapq.heappop() when the list is being resized concurrently.

Fix issue16932: Fix the urlparse example. Remote :port when scheme is not specified to demonstrate correct behavior

This fixes an apparent copy-and-paste error.

Patch by Manuel Jacob.

Patch by Lowe Thiderman

#15438: add a note to math.pow() that suggests using **/pow() for integers.  Patch by Mark Dickinson.

with 1, as in other lines.

This fixes a bytes/string confusion in the API which prevented
custom authobjects from working at all.

Original patch by Erno Tukia.

Patch by Alexander Belopolsky.

a string argument contains non-BMP character.