Reformatting test case as well

Author: ankurkaushal

observer/src/test/java/com/iluwatar/observer/AppTest.java

@@ -11,9 +11,9 @@
  */
 public class AppTest {
 
-	@Test
-	public void test() {
-		String[] args = {};
-		App.main(args);
-	}
+  @Test
+  public void test() {
+    String[] args = {};
+    App.main(args);
+  }
 }