Note -> Edition Difference

Author: Havvy

src/items/associated-items.md

@@ -134,10 +134,10 @@ let circle_shape = Circle::new();
 let bounding_box = circle_shape.bounding_box();
 ```
 
-> NOTE: Until the 2018 edition, it was possible to declare trait methods with
-> anonymous parameters (e.g. `fn foo(u8)`). This was deprecated and disallowed
-> in the 2018 edition. All parameters must have an argument name. See [RFC
-> 1685](https://github.com/rust-lang/rfcs/pull/1685).
+> **Edition Differences**: Until the 2018 edition, it was possible to declare
+> trait methods with anonymous parameters (e.g. `fn foo(u8)`). This was
+> deprecated and disallowed in the 2018 edition. All parameters must have an
+> argument name. See [RFC 1685](https://github.com/rust-lang/rfcs/pull/1685).
 
 ## Associated Types