update select combobox demo

components/select/demo/combobox.md

@@ -0,0 +1,38 @@
+# suggest
+
+- order: 4
+
+类似 Google 搜索的输入框自动提示功能。
+
+---
+
+
+````jsx
+var Select = antd.Select;
+var Option = Select.Option;
+
+var Test = React.createClass({
+  getInitialState() {
+    return {
+      options: []
+    };
+  },
+  handleChange(value) {
+    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
+    });
+  },
+  render() {
+    return <Select combobox style={{width:200}} onChange={this.handleChange}>
+      {this.state.options}
+    </Select>;
+  }
+});
+
+React.render(<Test />, document.getElementById('components-select-demo-combobox'));
+````
+

style/components/select.less

@@ -89,7 +89,7 @@
       text-overflow: ellipsis;
       padding-left: 10px;
       padding-right: 20px;
-      line-height: 28px;
+      line-height: 26px;
     }
 
     .@{selectPrefixCls}-selection__clear {