fix task list in collab example, fix #246, fix #247

docs/src/demos/Examples/CollaborativeEditing/index.vue

@@ -33,10 +33,6 @@ import { WebsocketProvider } from 'y-websocket'
 import { IndexeddbPersistence } from 'y-indexeddb'
 import MenuBar from './MenuBar.vue'
 
-const CustomTaskItem = TaskItem.extend({
-  content: 'paragraph',
-})
-
 const getRandomElement = list => {
   return list[Math.floor(Math.random() * list.length)]
 }
@@ -77,7 +73,7 @@ export default {
         ...defaultExtensions().filter(extension => extension.config.name !== 'history'),
         Highlight,
         TaskList,
-        CustomTaskItem,
+        TaskItem,
         CollaborationCursor.configure({
           provider: this.provider,
           user: this.currentUser,