Docs are incorrect re: constant initialization in the C99 standard

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-09-28.00:24:44.038>
labels = ['docs']
title = 'Docs are incorrect re: constant initialization in the C99 standard'
updated_at = <Date 2021-09-28.00:24:44.038>
user = 'https://bugs.python.org/jhaberman'

bugs.python.org fields:

activity = <Date 2021-09-28.00:24:44.038>
actor = 'jhaberman'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2021-09-28.00:24:44.038>
creator = 'jhaberman'
dependencies = []
files = []
hgrepos = []
issue_num = 45306
keywords = []
message_count = 1.0
messages = ['402752']
nosy_count = 2.0
nosy_names = ['docs@python', 'jhaberman']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue45306'
versions = []