iluwatar#1842 Added documentation to AppTest

Author: hkattt

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

@@ -28,6 +28,9 @@
 
 import org.junit.jupiter.api.Test;
 
+/**
+ * Tests that the App can be run without throwing any exceptions.
+ */
 public class AppTest {
   @Test
   void executesWithoutExceptions() {