Reformat JUnit 5 examples

junit5/src/test/java/com/baeldung/ExceptionTest.java

@@ -2,8 +2,6 @@ package com.baeldung;
 
 import org.junit.gen5.api.Test;
 
-import java.util.ArrayList;
-
 import static org.junit.gen5.api.Assertions.assertEquals;
 import static org.junit.gen5.api.Assertions.expectThrows;
 
@@ -12,7 +10,9 @@ public class ExceptionTest {
     @Test
     void shouldThrowException() {
         Throwable exception = expectThrows(UnsupportedOperationException.class,
-                () -> {throw new UnsupportedOperationException("Not supported");});
+                () -> {
+                    throw new UnsupportedOperationException("Not supported");
+                });
         assertEquals(exception.getMessage(), "Not supported");
     }
 }