Reword description of how a listing came to be

Fixes #3085.

src/ch07-03-paths-for-referring-to-an-item-in-the-module-tree.md

@@ -17,8 +17,8 @@ separated by double colons (`::`).
 
 Let’s return to the example in Listing 7-1. How do we call the
 `add_to_waitlist` function? This is the same as asking, what’s the path of the
-`add_to_waitlist` function? In Listing 7-3, we simplified our code a bit by
-removing some of the modules and functions. We’ll show two ways to call the
+`add_to_waitlist` function? Listing 7-3 contains Listing 7-1 with some of the
+modules and functions removed. We’ll show two ways to call the
 `add_to_waitlist` function from a new function `eat_at_restaurant` defined in
 the crate root. The `eat_at_restaurant` function is part of our library crate’s
 public API, so we mark it with the `pub` keyword. In the [“Exposing Paths with