_thread: acquire_lock,release_lock still in use while declared to be "gone" in Documentation

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-07-17.10:23:49.505>
labels = ['3.7', 'type-feature', 'library']
title = '_thread: acquire_lock,release_lock still in use while declared to be "gone" in Documentation'
updated_at = <Date 2019-07-18.02:18:54.151>
user = 'https://github.com/shiyuchong'

bugs.python.org fields:

activity = <Date 2019-07-18.02:18:54.151>
actor = 'shiyuchong'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2019-07-17.10:23:49.505>
creator = 'shiyuchong'
dependencies = []
files = []
hgrepos = []
issue_num = 37608
keywords = []
message_count = 3.0
messages = ['348053', '348083', '348094']
nosy_count = 3.0
nosy_names = ['brett.cannon', 'docs@python', 'shiyuchong']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue37608'
versions = ['Python 3.7']