Unclear intention of deprecating Py_UNICODE_TOLOWER / Py_UNICODE_TOUPPER

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-12-18.02:00:12.723>
labels = ['expert-unicode']
title = 'Unclear intention of deprecating Py_UNICODE_TOLOWER / Py_UNICODE_TOUPPER'
updated_at = <Date 2019-10-27.16:17:44.802>
user = 'https://github.com/ideasman42'

bugs.python.org fields:

activity = <Date 2019-10-27.16:17:44.802>
actor = 'vstinner'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Unicode']
creation = <Date 2017-12-18.02:00:12.723>
creator = 'ideasman42'
dependencies = []
files = []
hgrepos = []
issue_num = 32354
keywords = []
message_count = 4.0
messages = ['308506', '308523', '308607', '355480']
nosy_count = 3.0
nosy_names = ['vstinner', 'ezio.melotti', 'ideasman42']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue32354'
versions = ['Python 3.6']