Fix helpWindow bug

src/main/java/seedu/address/ui/HelpWindow.java

@@ -18,8 +18,12 @@
 public class HelpWindow extends UiPart<Stage> {
 
     public static final String USERGUIDE_URL = "https://ay1920s1-cs2103t-w12-1.github.io/main/UserGuide.html";
-    public static TreeSet<String> defaultCommandList = new TreeSet<>(FinSecParser.getCommandList().values());
-    public static String helpMsg = "The 'help' command format is as follows: "
+
+    private static final Logger logger = LogsCenter.getLogger(HelpWindow.class);
+    private static final String FXML = "HelpWindow.fxml";
+
+    private static TreeSet<String> defaultCommandList = new TreeSet<>(FinSecParser.getCommandList().values());
+    private static String helpMsg = "The 'help' command format is as follows: "
             + "help cmd/COMMAND type/TYPE"
             + "\n\n"
             + "Command List: \n"
@@ -38,9 +42,6 @@ public class HelpWindow extends UiPart<Stage> {
             + "Example: help cmd/add_contact type/guide\n"
             + "For more information you can refer to the user guide by clicking on the button";
 
-    private static final Logger logger = LogsCenter.getLogger(HelpWindow.class);
-    private static final String FXML = "HelpWindow.fxml";
-
     @FXML
     private Button gotoButton;
 
@@ -113,6 +114,10 @@ public static TreeSet<String> getDefaultCommandList() {
         return defaultCommandList;
     }
 
+    public static String getHelpMsg() {
+        return helpMsg;
+    }
+
     /**
      * Copies the URL to the user guide to the clipboard.
      */