message: docs: change (+) operator to `Number` function to match code
  PR Close
diff: @@ -406,7 +406,7 @@ The `paramMap` is a dictionary of route parameter values extracted from the URL.
  The `"id"` key returns the `id` of the hero to fetch.
  Route parameters are always strings.
  -The JavaScript (+) operator converts the string to a number,
  +The JavaScript `Number` function converts the string to a number,
  which is what a hero `id` should be.
  The browser refreshes and the application crashes with a compiler error.
  