Iterators and Generators: sum should be 15, not 10

README.md

@@ -786,16 +786,16 @@
       sum += num;
     }
 
-    sum === 10;
+    sum === 15;
 
     // good
     let sum = 0;
     numbers.forEach((num) => sum += num);
-    sum === 10;
+    sum === 15;
 
     // best (use the functional force)
     const sum = numbers.reduce((total, num) => total + num, 0);
-    sum === 10;
+    sum === 15;
     ```
 
   - Don't use generators.