require ASCII right argument and assert this condition in debug build.

The latter function is more readable, faster and doesn't raise exceptions.

Based on patch by Xiang Zhang.

The latter function is more readable, faster and doesn't raise exceptions.

Based on patch by Xiang Zhang.

The latter function is more readable, faster and doesn't raise exceptions.

The latter function is more readable, faster and doesn't raise exceptions.

on platforms that do not have langinfo

incorrectly formats %V or %G for the last or the first
incomplete week in a year

would raise ImportError

Issue #28691: Fix warn_invalid_escape_sequence(): handle correctly
DeprecationWarning raised as an exception. First clear the current exception to
replace the DeprecationWarning exception with a SyntaxError exception.

Unit test written by Serhiy Storchaka.

Per suggestions by Ivan Levkivskyi.
Patch by Elvis Pranskevichus.

non-integer numbers.  Django tests depend on this.

non-integer numbers.  Django tests depend on this.

non-integer numbers.  Django tests depend on this.

non-integer numbers.  Django tests depend on this.

"issue28082: use IntFlag for re constants" by Ethan Furman.

The re module is not more used in the site module and so adding "import enum"
to re.py doesn't impact python_startup benchmark anymore.