fix writting error

Author: jarry

docs/index.md

@@ -463,79 +463,7 @@
     const view = new View(doc.querySelector('#mvp-dispatch-view'))
     const controller = new Controller(view, model)
     controller.init()
-  })(window, document)  !(function(win, doc) {
-    class Observer {
-      constructor() {
-        this.observers = []
-      }
-      register(callback) {
-        this.observers.push(callback)
-      }
-      notify(args) {
-        for (let i = 0, l = this.observers.length; i < l; i++) {
-          this.observers[i](args)
-        }
-      }
-    }
-    // View
-    class View {
-      constructor($el, tpl) {
-        this.$el = $el
-        this.tpl = tpl
-        this.onAdd = new Observer(this)
-        this.onChange = new Observer(this)
-      }
-      render(data) {
-        this.$el.innerHTML = this.compile(data)
-      }
-      compile(data) {
-        return this.tpl || `<div><b>${data.name}</b>
-         <em>${data.num}</em></div>`
-      }
-    }
-    // Model
-    class Model {
-      constructor() {
-        this.data = { name: 'MVP+Dispatch', num: 1 }
-        this.onUpdate = new Observer(this)
-        this.onChange = new Observer(this)
-      }
-      update(value) {
-        const fn = (res) => {
-          this.data.num += value
-          this.onUpdate.notify(value)
-        }
-        fetch('./').then(fn).catch(fn)
-      }
-      change(name) {
-        this.data.name = name
-        this.onChange.notify(name)
-      }
-    }
-    // Controller
-    class Controller {
-      constructor(view, model) {
-        this.view = view
-        this.model = model
-      }
-      init() {
-        this.view.$el.addEventListener('click', evt => this.view.onAdd.notify(1))
-        this.view.$el.addEventListener('mouseout', evt => this.view.onChange.notify('Click to add'))
-        this.view.onAdd.register(value => {
-          this.model.data.name = 'Click to add:Event dispatch.'
-          this.model.update(value)
-        })
-        this.view.onChange.register(name => this.model.change(name))
-        this.model.onUpdate.register(value => this.view.render(this.model.data))
-        this.model.onChange.register(name => this.view.render(this.model.data))
-        this.view.render(this.model.data)
-      }
-    }
-    const model = new Model()
-    const view = new View(doc.querySelector('#mvp-dispatch-view'))
-    const controller = new Controller(view, model)
-    controller.init()
-  })(window, document)v
+  })
 ```
 
 ### 6. 前端MVVM模式，通过观察者模式将数据与视图进行双向绑定，然后由数据驱动更改