fix: slider demo

Author: paranoidjk

components/slider/demo/basic.md

@@ -43,8 +43,8 @@ class App extends React.Component {
           <p className="title">Slider 自定义颜色</p>
           <Slider defaultValue={26} min={0} max={30} maximumTrackStyle={{ backgroundColor: 'red', height: 10 }}
             minimumTrackStyle={{ backgroundColor: 'blue', height: 10 }}
-            handleStyle={{ borderColor: 'blue', height: 28, width: 28, marginLeft: -14, marginTop: -9,
-              backgroundColor: 'blue' }} />
+            handleStyle={{ borderColor: 'blue', height: 28, width: 28, marginLeft: -14, marginTop: -9, backgroundColor: 'blue' }}
+          />
         </WingBlank>
       </div>
     );