All CLA requirements met.

This is great, I don't have any code recommendations (given the simplicity of the implementation) and the tests look good. I went to check babels implementation details only to find my way back to the linked issue.

My only question is do you want to add a codefix for these too?

only to find my way back to the linked issue

Yeah sorry, I raised issues in acorn, babel and typescript together (and PR'd it into babel) 😄

My only question is do you want to add a codefix for these too?

Sure, I'd love to!
Just triple checking my understanding of the codebase is right - is this the correct place to learn about, and add code fixes?
https://github.com/microsoft/TypeScript/tree/master/src/services/codefixes

is this the correct place to learn about, and add code fixes?

Yes, it is the right place (:

Took me a minute to figure everything out, but I got there in the end.
LMK if the codefix implementation looks good.

This looks perfect, thanks @bradzacher 👍

Nice one, immediately caught an error in a DT test case 👌