It used to (**on stable and beta**) look like this:  But on **nightly** it looks like:  The source code for the snippet is: `````rust /// ### Example /// /// ```rust /// if let _ = 123 { /// println!("always runs!"); /// } /// ``` ````` This is true for other code snippets in the lint listing, though the rest of the book (and other books) don't have the issue.