I saw this line of code in a test I'm trying to get to pass.
stack = Overflow.at(10) + 3
I've never seen a method called like this. Every book/blog I've seen only shows what's happening inside the parentheses (like the splat operator, multiple params, etc). I've never seen something added to a method call, outside the parentheses, and I can't even figure out how to word what's happening to look it up to research/learn.
Any help on what exactly is happening, even if it's just what exactly this is technique is called for me to research, is greatly appreciated.