Update 09.1-animation.md

docs/09.1-animation.md

@@ -88,7 +88,7 @@ You'll notice that when you try to remove an item `ReactCSSTransitionGroup` keep
 In order for it to apply transitions to its children, the `ReactCSSTransitionGroup` must already be mounted in the DOM. The example below would not work, because the `ReactCSSTransitionGroup` is being mounted along with the new item, instead of the new item being mounted within it. Compare this to the [Getting Started](/docs/docs/09.1-animation.md#getting-started) section above to see the difference.
 
 ```javascript{12-14}
-render: function() {
+  render: function() {
     var items = this.state.items.map(function(item, i) {
       return (
         <div key={item} onClick={this.handleRemove.bind(this, i)}>
@@ -97,7 +97,7 @@ render: function() {
           </ReactCSSTransitionGroup>
         </div>
       );
-    }.bind(this));
+    }, this);
     return (
       <div>
         <button onClick={this.handleAdd}>Add Item</button>