diff --git a/zulip_bots/zulip_bots/lib.py b/zulip_bots/zulip_bots/lib.py
index 1ff9626..5d1b362 100644
--- a/zulip_bots/zulip_bots/lib.py
+++ b/zulip_bots/zulip_bots/lib.py
@@ -121,7 +121,7 @@ class StateHandler(object):
 
     @contextmanager
     def state(self, default):
-        #type: (Any) -> Any
+        # type: (Any) -> Any
         new_state = self.get_state() or default
         yield new_state
         self.set_state(new_state)