Note that if arrow_spacing is enabled, and you pass an empty function as a parameter, arrow_spacing will accept either a space or no space in-between the arrow operator and the parenthesis
# Both of this will not trigger an error, # even with arrow_spacing enabled. x(-> 3) x( -> 3) # However, this will trigger an error x((a,b)-> 3) default level: ignore
# Good! class BoaConstrictor # Bad! class boaConstrictor This rule is enabled by default. default level: error