Update README.md

Author: dabeng

README.md

@@ -34,7 +34,7 @@ $ npm install orgchart
 ```
 require('orgchart') will load orgchart plugin onto the jQuery object. The orgchart module itself does not export anything.
 
-## [Demo](https://rawgit.com/dabeng/OrgChart/master/demo/index.html)    [All demos in one page](http://dabeng.github.io/OrgChart/)
+## [Demo](https://rawgit.com/dabeng/OrgChart/master/demo/index.html)        [All demos in one page](http://dabeng.github.io/OrgChart/)
 ### online demos
 - [using ul datasource](https://rawgit.com/dabeng/OrgChart/master/demo/ul-datasource.html)(this feature comes from [Tobyee's good idea:blush:](https://github.com/dabeng/OrgChart/issues/1))