Index is undefined.

vishalkakadiya · web-flow · commit e85074a78df3 · 2017-02-16T00:39:37.000+05:30
Fix issue of index is undefined, as every time first element was deleted not the current one.
diff --git a/src/guide/index.md b/src/guide/index.md
@@ -160,9 +160,9 @@ new Vue({
 <div id="app">
   <input v-model="newTodo" v-on:keyup.enter="addTodo">
   <ul>
-    <li v-for="todo in todos">
+    <li v-for="(todo, index) in todos">
       <span>{{ todo.text }}</span>
-      <button v-on:click="removeTodo($index)">X</button>
+      <button v-on:click="removeTodo(index)">X</button>
     </li>
   </ul>
 </div>
