Updated index.js with 2 additions and 2 removals
--- a/index.js
+++ b/index.js
@@ -65,10 +65,10 @@
 
 switch (command) {
   case 'add':
-    if (!arg) {
+    if (args.length === 0) {
       console.log('Usage: node index.js add <description>');
       break;
     }
-    addTask(arg);
+    addTask(args.join(' '));
     break;
   case 'list':
     listTasks();