allow string as sep in _Py_strhex_impl ( bytearray.hex() )

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2022-03-17.21:03:45.219>
labels = ['interpreter-core', 'type-feature', '3.11']
title = 'allow string as sep in _Py_strhex_impl ( bytearray.hex() )'
updated_at = <Date 2022-03-17.21:45:08.249>
user = 'https://github.com/arne123'

bugs.python.org fields:

activity = <Date 2022-03-17.21:45:08.249>
actor = 'Dennis Sweeney'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2022-03-17.21:03:45.219>
creator = 'arne123'
dependencies = []
files = []
hgrepos = []
issue_num = 47052
keywords = []
message_count = 4.0
messages = ['415447', '415450', '415451', '415452']
nosy_count = 3.0
nosy_names = ['gregory.p.smith', 'Dennis Sweeney', 'arne123']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue47052'
versions = ['Python 3.11']