Roundtrip-test tokenize.untokenize(iterable_of_5_tuples)

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Description

assignee = 'https://github.com/terryjreedy'
closed_at = None
created_at = <Date 2014-02-23.22:07:06.807>
labels = ['tests', 'type-bug', 'library', '3.11']
title = 'Roundtrip-test tokenize.untokenize(iterable_of_5_tuples)'
updated_at = <Date 2021-12-03.11:39:03.920>
user = 'https://github.com/terryjreedy'

activity = <Date 2021-12-03.11:39:03.920>
actor = 'iritkatriel'
assignee = 'terry.reedy'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)', 'Tests']
creation = <Date 2014-02-23.22:07:06.807>
creator = 'terry.reedy'
dependencies = []
files = []
hgrepos = []
issue_num = 20750
keywords = []
message_count = 4.0
messages = ['212034', '212040', '212043', '407578']
nosy_count = 3.0
nosy_names = ['terry.reedy', 'python-dev', 'iritkatriel']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'needs patch'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue20750'
versions = ['Python 3.11']

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