gitmate_rebaser: TypeError: 'NoneType' object is not iterable
https://sentry.gitmate.io/gitmate/master-backend/issues/134/
TypeError: 'NoneType' object is not iterable
File "celery/app/trace.py", line 374, in trace_task
R = retval = fun(*args, **kwargs)
File "celery/app/trace.py", line 629, in __protected_call__
return self.run(*args, **kwargs)
File "plugins/gitmate_rebaser/responders.py", line 63, in apply_command_on_merge_request
cmd, cmd_past = get_matched_command(comment.body, username)
TypeError: 'NoneType' object is not iterable