Fix example for animation

* Highlight the correct lines
* Add missing text to button
* Remove unnecessary div

(cherry picked from commit c91f95a)

Author: waldreiter

docs/docs/09.1-animation.md

@@ -17,7 +17,7 @@ React provides a `ReactTransitionGroup` addon component as a low-level API for a
 
 `ReactCSSTransitionGroup` is the interface to `ReactTransitions`. This is a simple element that wraps all of the components you are interested in animating. Here's an example where we fade list items in and out.
 
-```javascript{22-24}
+```javascript{30-32}
 /** @jsx React.DOM */
 
 var ReactCSSTransitionGroup = React.addons.CSSTransitionGroup;
@@ -33,7 +33,7 @@ var TodoList = React.createClass({
   },
   handleRemove: function(i) {
     var newItems = this.state.items;
-    newItems.splice(i, 1)
+    newItems.splice(i, 1);
     this.setState({items: newItems});
   },
   render: function() {
@@ -46,7 +46,7 @@ var TodoList = React.createClass({
     }.bind(this));
     return (
       <div>
-        <div><button onClick={this.handleAdd} /></div>
+        <button onClick={this.handleAdd}>Add Item</button>
         <ReactCSSTransitionGroup transitionName="example">
           {items}
         </ReactCSSTransitionGroup>