Oh damn. I have been using `_1`, `_2`, etc. extensively for years... I didn't know about that footgun. I'd like know if `it` is merely an alias for `_1`, or if

Oh damn. I have been using `_1`, `_2`, etc. extensively for years... I didn't know about that footgun. I'd like know if `it` is merely an alias for `_1`, or if protects from this "arity issue" too.