This makes it a bit more visually distinguished from the paragraph before. I think that's a good thing as it's essentially a completely separate topic.
Unlike other code I've seen in the guide, this code didn't compile. It's especially bad that it can be the first experience someone has with actix-web, and then doesn't work. I'm going to run through the docs as a first-time user so I'll try to make sure everything works the way it's supposed to.
