typing docs: Mention PEP 604 syntax more prominently

[srittau]

BPO	44957
Nosy	@gvanrossum, @srittau, @ambv, @miss-islington, @Fidget-Spinner
PRs	bpo-44957: Promote PEP 604 syntax in typing docs #27833 [3.10] bpo-44957: Promote PEP 604 syntax in typing docs (GH-27833) #27897

^{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 2021-08-22.20:05:09.877>
created_at = <Date 2021-08-19.13:50:37.936>
labels = ['3.11', '3.10', 'docs']
title = 'typing docs: Mention PEP 604 syntax more prominently'
updated_at = <Date 2021-08-22.20:05:09.876>
user = 'https://github.com/srittau'

bugs.python.org fields:

activity = <Date 2021-08-22.20:05:09.876>
actor = 'lukasz.langa'
assignee = 'docs@python'
closed = True
closed_date = <Date 2021-08-22.20:05:09.877>
closer = 'lukasz.langa'
components = ['Documentation']
creation = <Date 2021-08-19.13:50:37.936>
creator = 'srittau'
dependencies = []
files = []
hgrepos = []
issue_num = 44957
keywords = ['patch']
message_count = 6.0
messages = ['399919', '399921', '399925', '399926', '400092', '400102']
nosy_count = 6.0
nosy_names = ['gvanrossum', 'srittau', 'docs@python', 'lukasz.langa', 'miss-islington', 'kj']
pr_nums = ['27833', '27897']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue44957'
versions = ['Python 3.10', 'Python 3.11']

[srittau]

The new PEP-604 syntax for type unions should be mentioned more prominently in the typing docs, starting with Python 3.10. I'm preparing a PR for discussion.

[gvanrossum]

Ken, this sounds like a good idea. Can you help?

[Fidget-Spinner]

Sure. Sebastian has created a really thorough PR at #72020 and I like it (with only one point for discussion).

[gvanrossum]

Thanks to both of you!!

[ambv]

New changeset dabb6e8 by Sebastian Rittau in branch 'main':
bpo-44957: Promote PEP-604 syntax in typing docs (GH-27833)
dabb6e8

[ambv]

Thanks, Sebastian! ✨ 🍰 ✨