It's ok to me if the whole PR won't be accepted. As @robin850 said, it just a cosmetic change. 

@luke-gru I believe, that every rubyist (every developer) must know how the code works. It is fine, if he doesn't know how some specific thing works (e.g. `Kernel#caller`; may not be the best example). He may just not using it. But if he does, than he must know how it works. That's my point.

Lets take `super` for example: we use it every day. Therefore, I think every rubyist must know the difference between `super()`, a call with shortened argument list and `super`.