update demos

components/popover/demo/basic.md

@@ -9,7 +9,6 @@
 ````jsx
 var Popover = antd.Popover;
 var content = [
-  <p>内容</p>,
   <p>内容</p>,
   <p>内容</p>
 ];

components/popover/demo/placement.md

@@ -10,7 +10,6 @@
 var Popover = antd.Popover;
 var text = <span>标题</span>;
 var content = [
-  <p>内容</p>,
   <p>内容</p>,
   <p>内容</p>
 ];

components/popover/demo/triggerType.md

@@ -9,7 +9,6 @@
 ````jsx
 var Popover = antd.Popover;
 var content = [
-  <p>内容</p>,
   <p>内容</p>,
   <p>内容</p>
 ];

components/select/demo/combobox.md

@@ -18,16 +18,15 @@ var Test = React.createClass({
     };
   },
   handleChange(value) {
+    var options;
     if (!value) {
-      this.setState({
-        options: []
+      options = [];
+    } else {
+      options = ['gmail.com', '163.com', 'qq.com'].map(function(domain) {
+        var email = value + '@' + domain;
+        return <Option value={email}>{email}</Option>;
       });
-      return;
     }
-    var options = ['gmail.com', '163.com', 'qq.com'].map(function(domain) {
-      var email = value + '@' + domain;
-      return <Option value={email}>{email}</Option>;
-    });
     this.setState({
       options: options
     });