Python `functools.wraps` doesn't deal with defaults correctly

GitHub fields:

assignee = 'https://github.com/ncoghlan'
closed_at = None
created_at = <Date 2020-07-07.22:00:22.478>
labels = ['type-feature', '3.10']
title = "Python `functools.wraps` doesn't deal with defaults correctly"
updated_at = <Date 2021-05-03.19:52:34.043>
user = 'https://github.com/thorwhalen'

bugs.python.org fields:

activity = <Date 2021-05-03.19:52:34.043>
actor = 'Thor Whalen'
assignee = 'ncoghlan'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2020-07-07.22:00:22.478>
creator = 'Thor Whalen2'
dependencies = []
files = []
hgrepos = []
issue_num = 41232
keywords = ['patch']
message_count = 15.0
messages = ['373254', '373255', '373256', '373499', '374818', '374879', '374881', '374900', '392648', '392658', '392660', '392663', '392664', '392665', '392837']
nosy_count = 8.0
nosy_names = ['terry.reedy', 'gregory.p.smith', 'ncoghlan', 'JelleZijlstra', 'donovick', 'Thor Whalen', 'Thor Whalen2', 'domdfcoding']
pr_nums = ['21379']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue41232'
versions = ['Python 3.10']