Documentation of ipaddress behavior for prefix length with leading zeros.

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2022-02-03.02:46:49.404>
labels = ['3.7', '3.8', '3.9', '3.10', '3.11', 'type-feature', 'docs']
title = 'Documentation of ipaddress behavior for prefix length with leading zeros.'
updated_at = <Date 2022-02-03.02:46:49.404>
user = 'https://bugs.python.org/lay20114'

bugs.python.org fields:

activity = <Date 2022-02-03.02:46:49.404>
actor = 'lay20114'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2022-02-03.02:46:49.404>
creator = 'lay20114'
dependencies = []
files = []
hgrepos = []
issue_num = 46620
keywords = []
message_count = 1.0
messages = ['412412']
nosy_count = 2.0
nosy_names = ['docs@python', 'lay20114']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue46620'
versions = ['Python 3.7', 'Python 3.8', 'Python 3.9', 'Python 3.10', 'Python 3.11']