[Athas]

I never understood the motivation for allowing tuples without surrounding parens. There are a few very simple functions that look cuter this way, but it constantly trips me up in more complex situations.

[a-nikolaev]

No parentheses can be nice for cleaner pattern matching, e.g. something like this:

  match a, b with
  | 1, 2 -> x
  | _ -> y