Update intr.md

Author: aidlearning

intr.md

@@ -228,5 +228,7 @@ if __name__ == "__main__":
 ![sayhello](images/sayhello.png)
 
 更多中文资料(https://www.jianshu.com/p/f6ec13ece792)
+
 ![更多例子参考](images/examples.png)
+
 更多例子参考(http://code.aidlearning.net:3000/explore/repos)