Space in re's {min,max} should raise an error, rather than fail silently

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-11-26.07:09:54.395>
labels = ['expert-regex', 'type-bug', '3.10']
title = "Space in re's {min,max} should raise an error, rather than fail silently"
updated_at = <Date 2021-07-17.14:52:02.804>
user = 'https://github.com/reuven'

bugs.python.org fields:

activity = <Date 2021-07-17.14:52:02.804>
actor = 'andrei.avk'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Regular Expressions']
creation = <Date 2020-11-26.07:09:54.395>
creator = 'reuven'
dependencies = []
files = []
hgrepos = []
issue_num = 42469
keywords = []
message_count = 5.0
messages = ['381879', '381919', '381994', '382045', '397725']
nosy_count = 7.0
nosy_names = ['rhettinger', 'terry.reedy', 'ezio.melotti', 'mrabarnett', 'serhiy.storchaka', 'reuven', 'andrei.avk']
pr_nums = []
priority = 'low'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue42469'
versions = ['Python 3.10']