Fixed NumberFormatException message test

Author: fulminazzo

demo/src/test/java/it/fulminazzo/yagl/commands/ShellCommandTest.java

@@ -38,7 +38,7 @@ void testNumberFormatExceptionReplacement() {
                 "    try {\n" +
                 "        sender.sendMessage(\"Your number is ${Integer.valueOf(args[0])}\")\n" +
                 "    } catch (NumberFormatException ignored) {\n" +
-                "    sender.sendMessage(e.message.replace('For input string: ', 'Invalid number '))\n" +
+                "    sender.sendMessage(ignored.message.replace('For input string: ', 'Invalid number '))\n" +
                 "    }\n" +
                 "}\n" +
                 "run(sender, label, args)";