Formatted all files to the same standard

singleton/src/main/java/com/iluwatar/App.java

@@ -1,19 +1,19 @@
 package com.iluwatar;
 
 /**
- *
+ * 
  * Singleton pattern ensures that the class (IvoryTower) can have only one
  * existing instance and provides global access to that instance.
- *
+ * 
  */
 public class App {
 
-    public static void main(String[] args) {
+	public static void main(String[] args) {
 
-        IvoryTower ivoryTower1 = IvoryTower.getInstance();
-        IvoryTower ivoryTower2 = IvoryTower.getInstance();
-        System.out.println("ivoryTower1=" + ivoryTower1);
-        System.out.println("ivoryTower2=" + ivoryTower2);
+		IvoryTower ivoryTower1 = IvoryTower.getInstance();
+		IvoryTower ivoryTower2 = IvoryTower.getInstance();
+		System.out.println("ivoryTower1=" + ivoryTower1);
+		System.out.println("ivoryTower2=" + ivoryTower2);
 
-    }
+	}
 }