unittest assert helper methods have incorrect signature in docs

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-01-07.04:17:47.372>
labels = ['3.11', '3.9', '3.10', 'docs']
title = 'unittest assert helper methods have incorrect signature in docs'
updated_at = <Date 2021-04-25.16:15:40.381>
user = None

bugs.python.org fields:

activity = <Date 2021-04-25.16:15:40.381>
actor = 'iritkatriel'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2019-01-07.04:17:47.372>
creator = '\xd7\x90\xd7\x95\xd7\xa8\xd7\x99'
dependencies = []
files = []
hgrepos = []
issue_num = 35676
keywords = []
message_count = 3.0
messages = ['333137', '333139', '333163']
nosy_count = 6.0
nosy_names = ['rbcollins', 'ezio.melotti', 'michael.foord', 'docs@python', 'xtreak', '\xd7\x90\xd7\x95\xd7\xa8\xd7\x99']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue35676'
versions = ['Python 3.9', 'Python 3.10', 'Python 3.11']