CONTRIBUTING.md

Author: AllenFang

CONTRIBUTING.md

@@ -1,5 +1,5 @@
 **Currently, I'm busy on my job, so maybe have some delay on you guys's issue.**
 
-* Please make sure your issue was open before
+* Please make sure your issue wasn't open before
 * Please provide your example code and keep it simple and minimal if necessary
 * Please give a clean steps to show everyone how to reproduce your issus