Investigate using a context variable for zero-arg super initialisation

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2018-03-29.14:15:52.797>
labels = ['type-feature', '3.8']
title = 'Investigate using a context variable for zero-arg super initialisation'
updated_at = <Date 2018-03-29.15:18:10.623>
user = 'https://github.com/ncoghlan'

bugs.python.org fields:

activity = <Date 2018-03-29.15:18:10.623>
actor = 'yselivanov'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2018-03-29.14:15:52.797>
creator = 'ncoghlan'
dependencies = []
files = []
hgrepos = []
issue_num = 33179
keywords = []
message_count = 4.0
messages = ['314650', '314651', '314654', '314658']
nosy_count = 4.0
nosy_names = ['ncoghlan', 'petr.viktorin', 'yselivanov', 'Martin.Teichmann']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue33179'
versions = ['Python 3.8']