Update iterator readme

iterator/README.md

@@ -19,10 +19,10 @@ underlying representation.
 
 ## Explanation
 
-Real world example
+Real-world example
 
 > Treasure chest contains a set of magical items. There multiple types of items such as rings, 
-> potions and weapons. The items can be browsed by type using an iterator the treasure chest 
+> potions, and weapons. The items can be browsed by type using an iterator the treasure chest 
 > provides. 
 
 In plain words
@@ -113,7 +113,7 @@ public interface Iterator<T> {
 }
 ```
 
-In the following example we iterate through the ring type items found in the chest. 
+In the following example, we iterate through the ring-type items found in the chest. 
 
 ```java
 var itemIterator = TREASURE_CHEST.iterator(ItemType.RING);
@@ -145,7 +145,7 @@ Use the Iterator pattern
 
 * [How to Use Iterator?](http://www.tutorialspoint.com/java/java_using_iterator.htm)
 
-## Real world examples
+## Known uses
 
 * [java.util.Iterator](http://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html)
 * [java.util.Enumeration](http://docs.oracle.com/javase/8/docs/api/java/util/Enumeration.html)