update docs/vue-vuex.md.

docs/vue-vuex.md

@@ -197,7 +197,7 @@ Vue.use(Vuex);//vue的插件机制
 //Vuex.Store 构造器选项
 const store = new Vuex.Store({
 	state:{//存放状态
-		"username":"foo"
+		"username":"foo",
 		"age":18
 	}
 })