F# function arguments and parens style.

FunctionParens.fsx

// A difference of F# to C# is tupled versus curried function arguments.
// I suggest this F# function application style;
// * Separate functions from their arguments with a space.
// * Only use parens with tuples or when adding type annotations to curried args.

let f x = x
let add x y = x + y
let add' (x, y) = x + y

let y = f 1 // not f(1)
let five = add 2 3 // or with a redundant type annotation add (2 : int) 3
let five' = add' (2, 3) // not add'(2, 3)