BAEL-5421 by @opokharel

BAEL-5421 by @opokharel

core-java-modules/core-java-jar/src/main/java/com/baeldung/jar/MySampleGUIAppn.java

@@ -5,7 +5,7 @@ import java.awt.*;
 
 import javax.swing.*;
 
-public class MySampleGUIAppn extends JFrame{
+public class MySampleGUIAppn extends JFrame {
     public  MySampleGUIAppn() {
         if (!GraphicsEnvironment.isHeadless()) {
             setSize(300,300);
@@ -20,7 +20,6 @@ public class MySampleGUIAppn extends JFrame{
                     System.exit(0);
                 }
             });
-
         }
         else {
             System.exit(0);

core-java-modules/core-java-jar/src/test/java/com/baeldung/jar/MySampleGUIAppnUnitTest.java

@@ -5,7 +5,6 @@ import java.io.IOException;
 import org.junit.jupiter.api.Test;
 
 class MySampleGUIAppnUnitTest {
-
     @Test
     void testMain() throws IOException {
         System.setProperty("java.awt.headless", "true");