Docs for typing.ForwardRef don't state that it was added in 3.7

[dom1310df]

BPO	41824
Nosy	@gvanrossum, @Fidget-Spinner
PRs	bpo-41824: Add versionadded for typing.ForwardRef docs #24224 [3.9] bpo-41824: Add versionadded for typing.ForwardRef docs (GH-24224) #24493 [3.8] bpo-41824: Add versionadded for typing.ForwardRef docs (GH-24224) #24494 [3.8] bpo-41824: Fix indentation issue in ForwardRef docs #24495

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2021-02-09.19:02:00.442>
created_at = <Date 2020-09-21.16:35:27.069>
labels = ['3.7', 'docs']
title = "Docs for typing.ForwardRef don't state that it was added in 3.7"
updated_at = <Date 2021-02-09.19:02:00.441>
user = 'https://bugs.python.org/dom1310df'

bugs.python.org fields:

activity = <Date 2021-02-09.19:02:00.441>
actor = 'gvanrossum'
assignee = 'docs@python'
closed = True
closed_date = <Date 2021-02-09.19:02:00.442>
closer = 'gvanrossum'
components = ['Documentation']
creation = <Date 2020-09-21.16:35:27.069>
creator = 'dom1310df'
dependencies = []
files = []
hgrepos = []
issue_num = 41824
keywords = ['patch']
message_count = 6.0
messages = ['377262', '386686', '386728', '386729', '386731', '386732']
nosy_count = 4.0
nosy_names = ['gvanrossum', 'docs@python', 'dom1310df', 'kj']
pr_nums = ['24224', '24493', '24494', '24495']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue41824'
versions = ['Python 3.6', 'Python 3.7']

[dom1310df]

typing.ForwardRef was first documented in #58424 but there's no mention that the class was only added in Python 3.7.

In Python 3.6 there's no typing.ForwardRef; there is a typing._ForwardRef which seems to be the same thing from before it was made public.

What I don't know is whether the change of name was made in 3.7 or in a point release.

[gvanrossum]

New changeset da21f7b by Ken Jin in branch 'master':
bpo-41824: Add versionadded for typing.ForwardRef docs (bpo-24224)
da21f7b

[gvanrossum]

New changeset 917eca7 by Ken Jin in branch '3.9':
bpo-41824: Add versionadded for typing.ForwardRef docs (bpo-24224) (bpo-24493)
917eca7