Merge pull request #3790 from Blatko1/main

Minor text improvements

Author: chriskrycho

src/appendix-03-derivable-traits.md

@@ -45,7 +45,7 @@ The `Debug` trait allows you to print instances of a type for debugging
 purposes, so you and other programmers using your type can inspect an instance
 at a particular point in a program’s execution.
 
-The `Debug` trait is required, for example, in use of the `assert_eq!` macro.
+The `Debug` trait is required, for example, in using the `assert_eq!` macro.
 This macro prints the values of instances given as arguments if the equality
 assertion fails so programmers can see why the two instances weren’t equal.