Small improvements

I run rubocop and he shows some formatting issues. I changed in the files helper.

And Rails renders automatically when you define empty method actions on controllers.

My first and a small contribution.
I like this discussion. I can see all the different opinions, and analyzing all the opinions, I think the implicit and explicitly are very relative. @modsognir I agreed with you about implicit with metaprogramming, and it could be a really pain about it. And I agree with the render method and 'I need something special'. But about this case I removed because, Rails already do this. On Rails 2 was more in the explicit way, after the Rails 2 they added this convention that you don't need to define the action, so since then I follow this convention. Actually it bit interesting what a small change can do a good technical discussion, =). But anyway, I'll revert this commit.