Consider quoting all values in Morsel objects

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2018-05-16.08:15:36.847>
labels = ['3.8', 'type-feature', 'library']
title = 'Consider quoting all values in Morsel objects'
updated_at = <Date 2018-05-16.08:36:13.178>
user = 'https://github.com/berkerpeksag'

bugs.python.org fields:

activity = <Date 2018-05-16.08:36:13.178>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2018-05-16.08:15:36.847>
creator = 'berker.peksag'
dependencies = []
files = []
hgrepos = []
issue_num = 33535
keywords = []
message_count = 1.0
messages = ['316781']
nosy_count = 4.0
nosy_names = ['alex', 'berker.peksag', 'serhiy.storchaka', 'Mark.Williams']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'test needed'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue33535'
versions = ['Python 3.8']