Issue #14775: Fix a potential quadratic dict build-up due to the garbage collector repeatedly trying to untrack dicts.
Additional comments by Tim Silk.

An issue in ctypes.c_longdouble, ctypes.c_double, and ctypes.c_float that
caused an incorrect exception to be returned in the case of overflow has been
fixed.

Original patch by Roger Serwy.

even when parent window is closed. Patch by Roger Serwy.

Patch by Roger Serwy.

Fix suggested by Itay Brandes

Patch by Victor Stinner.

Reverts some changes of a36666c52115.

In the case of os's `mknod(filename[, mode=0600[, device=0]])`, I have nested
the [] as setting mode doesn't require to set device (but setting device
requires to set mode).

Mostly just mechanical removal of []. In some rare cases I've pulled the
default value up into the argument list.

It doesn't get called on 'null', 'true', 'false' since f686aced02a3.

Original patch by Stefano Taschini.

sqlite3, such as was shipped with Centos 5 and Mac OS X 10.4.

 Issue #14426: Correct the Date format in Expires attribute of Set-Cookie. Patch by Federico Reghenzani and Müte Invert

Closes #14842.

This appears to have been a mixup introduced when we switched from
'expected/actual' to 'first/second'.  The problem doesn't exist
in the corresponding assertCountEqual method in Python3.

The behaviour of the parse_constant callback changed insofar that 'null',
'true', 'false' don't trigger its call anymore.

Patch by Serhiy Storchaka