cmd should have a hook in the finally block of cmdloop

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-01-04.19:17:36.213>
labels = ['3.8', 'type-feature', 'library']
title = 'cmd should have a hook in the finally block of cmdloop'
updated_at = <Date 2020-01-04.19:17:36.213>
user = 'https://github.com/josephcsible'

bugs.python.org fields:

activity = <Date 2020-01-04.19:17:36.213>
actor = 'Joseph Sible'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2020-01-04.19:17:36.213>
creator = 'Joseph Sible'
dependencies = []
files = []
hgrepos = []
issue_num = 39213
keywords = []
message_count = 1.0
messages = ['359305']
nosy_count = 1.0
nosy_names = ['Joseph Sible']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue39213'
versions = ['Python 3.8']