bpo-41624: fix documentation of typing.Coroutine

[Elaphurus]

The documentation [1] for Coroutine in typing library writes:

class typing.Coroutine(Awaitable[V_co], Generic[T_co T_contra, V_co])

which should be:

class typing.Coroutine(Awaitable[V_co], Generic[T_co, T_contra, V_co])

a comma is missed between the first type variable T_co and the second one T_contr.

[1] https://docs.python.org/3/library/typing.html#typing.Coroutine

https://bugs.python.org/issue41624

[the-knights-who-say-ni]

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[tirkarthi]

LGTM. Thanks. News entry is not needed. I will add skip-news label.

[miss-islington]

Thanks @Elaphurus for the PR, and @ambv for merging it 🌮🎉.. I'm working now to backport this PR to: 3.8.
🐍🍒⛏🤖

[miss-islington]

Thanks @Elaphurus for the PR, and @ambv for merging it 🌮🎉.. I'm working now to backport this PR to: 3.9.
🐍🍒⛏🤖

[miss-islington]

Sorry, @Elaphurus and @ambv, I could not cleanly backport this to 3.8 due to a conflict.
Please backport using cherry_picker on command line.
cherry_picker 8c58d2a216ca2b5965361df9b8d8944bc7d4854d 3.8

[miss-islington]

Sorry @Elaphurus and @ambv, I had trouble checking out the 3.9 backport branch.
Please backport using cherry_picker on command line.
cherry_picker 8c58d2a216ca2b5965361df9b8d8944bc7d4854d 3.9

[bedevere-bot]

GH-21982 is a backport of this pull request to the 3.9 branch.

[bedevere-bot]

GH-21983 is a backport of this pull request to the 3.8 branch.