I would like to give some feedback about incorrect work of the editor in the browser. Attached code is parsed without error in IDLE, but falls in browser editor

From: https://checkio.org/mission/end-of-other/solve/

HTTP_USER_AGENT:

Mozilla/5.0 (Windows NT 10.0; WOW64; rv:46.0) Gecko/20100101 Firefox/46.0