[2nd edition] Signature of foldLeft is inconsistent in answers and exercises module

[tPl0ch]

In the preview text of the 2nd edition the signatures of foldLeft and foldRight are consistent, but not in the git repository exercises module (the answers module is correct).

exercises module:
def foldLeft[A,B](l: List[A], z: B)(f: (B, A) => B): B = ???

answers module:
def foldLeft[A,B](l: List[A], z: B, f: (B, A) => B): B = ...

This raises the question should Scala's auto-curry feature be explained here? Currying has been covered in the previous chapter, so this would be a good oportunity to introduce that concept. This could also be applied to other HOFsin the 3rd chapter, i.e. filter or dropWhile.

[mpilquist]

Thanks for spotting, I'll address shortly. There's a footnote that talks about the tradeoffs between the two signatures and how the tradeoff changes with Scala 3 type inference.