Edit 3 for build-and-check Gradle

src/test/java/seedu/duke/ModuleListTest.java

@@ -28,7 +28,7 @@ void getDifferenceTest_twoModuleList_expectDifference() throws InvalidObjectExce
         }
     }
 
-    //success scenario 2: 2 ModuleList where the first is empty --> difference which is empty
+    //success scenario 2: 1 empty ModuleList, 1 ModuleList --> difference which is empty
     @Test
     void getDifferenceTest_oneEmptyModuleListAnotherModuleList_expectEmptyDifference() throws InvalidObjectException {
         ModuleList first = new ModuleList();