should pty.openpty() set pty/tty inheritable?

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-04-11.15:17:03.564>
labels = ['3.7', 'expert-IO']
title = 'should pty.openpty() set pty/tty inheritable?'
updated_at = <Date 2019-04-11.16:20:58.800>
user = 'https://github.com/cagney'

bugs.python.org fields:

activity = <Date 2019-04-11.16:20:58.800>
actor = 'hugh'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['IO']
creation = <Date 2019-04-11.15:17:03.564>
creator = 'cagney'
dependencies = []
files = []
hgrepos = []
issue_num = 36603
keywords = []
message_count = 1.0
messages = ['339982']
nosy_count = 3.0
nosy_names = ['twouters', 'cagney', 'hugh']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue36603'
versions = ['Python 3.7']