fix: make lesson 4 instructions clearer

myApp.js

@@ -90,8 +90,9 @@ var createAndSavePerson = function(done) {
 // e.g. when seeding a database with initial data. `Model.create()`
 // takes an array of objects like [{name: 'John', ...}, {...}, ...],
 // as the 1st argument, and saves them all in the db.
-// Create many people using `Model.create()`, using the function argument
-// 'arrayOfPeople'.
+// Modify the createManyPeople function to create many people through
+// Model.create() and the argument arrayOfPeople.
+// (You can reuse the model you instantiated in the previous exercise)
 
 var createManyPeople = function(arrayOfPeople, done) {