Transform => into -> (lenient-parser) 🏹

[kutyel]

Apparently some JS/Elm developers hit this case frequently, so it was worth a shot (let me know if you do not consider this contribution useful 🙏🏻 ).

Also sorry for a little noise but I was mostly addressing hlint recommendations for refactor/simplifications 😉

[avh4]

I'm okay with some hlint changes, but I'm not ready to accept broad formatting changes for the haskell code right now, sorry!

Would you mind trying this for function types too?

foo : Int => Int => Int => Int

.

[avh4]

Ah, so that change is in rightArrow, which affects multiple places.

Just checking where else that affects to make sure it seems safe...

• lambda expressions: it immediately follows a Pattern
• function types: it immediately follows a Type
• case branches: it immediately follows a Pattern

Since = has no valid meaning in Types and Patterns, I guess this should be safe 👍

[avh4]

Thanks!