bpo-40493: fix function type comment parsing

[hauntsaninja]

The grammar for func_type_input rejected things like (*t1) ->t2. This fixes that.

https://bugs.python.org/issue40493

Automerge-Triggered-By: @gvanrossum

[gvanrossum]

Thanks! How did you find this out so quickly?

[hauntsaninja]

I've been trying to fix various mypy test failures on 3.9!

[gvanrossum]

Awesome. Looking forward to your fixes. (Please CC me on any mypy PRs you submit.)

[gvanrossum]

Whoa, you need to regenerate parse.c (make regen-pegen).

[bedevere-bot]

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

Once you have made the requested changes, please leave a comment on this pull request containing the phrase I have made the requested changes; please review again. I will then notify any core developers who have left a review that you're ready for them to take another look at this pull request.

[hauntsaninja]

Right. Thanks for catching that! Github made it look deceptively easy there...

I have made the requested changes; please review again

[bedevere-bot]

Thanks for making the requested changes!

@gvanrossum: please review the changes made to this pull request.

[hauntsaninja]

And happy to cc you on mypy changes! :-) So far it's only the one (already merged): python/mypy#8743 (although I independently made the subscript AST fix of yours)

[gvanrossum]

Yup!

[miss-islington]

@hauntsaninja: Status check is done, and it's a success ✅ .