Made method TurnNumberSequence.getNextTurnNumber() return the calcula…

…ted turn number.

TDDMicroExercises.YoursSolutions/Java-benwu/TurnTicketDispenser/src/main/java/tddmicroexercises/turnticketdispenser/TurnNumberSequence.java

@@ -6,6 +6,6 @@ public class TurnNumberSequence
 
     public static int getNextTurnNumber()
     {
-        return turnNumber++;
+        return ++turnNumber;
     }
 }