From 486f1d2f484882b99600d2349f2ef3b652fb738f Mon Sep 17 00:00:00 2001
From: "neiljp (Neil Pilgrim)" <github@kepier.clara.net>
Date: Fri, 22 Dec 2017 11:15:08 -0800
Subject: [PATCH] mypy: Improve typing of zulip_bots/lib.py, to pass with
 strict-optional.

---
 zulip_bots/zulip_bots/lib.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zulip_bots/zulip_bots/lib.py b/zulip_bots/zulip_bots/lib.py
index c2d2c11..b0f1393 100644
--- a/zulip_bots/zulip_bots/lib.py
+++ b/zulip_bots/zulip_bots/lib.py
@@ -215,7 +215,7 @@ class ExternalBotHandler(object):
         sys.exit(message)
 
 def extract_query_without_mention(message, client):
-    # type: (Dict[str, Any], ExternalBotHandler) -> str
+    # type: (Dict[str, Any], ExternalBotHandler) -> Optional[str]
     """
     If the bot is the first @mention in the message, then this function returns
     the stripped message with the bot's @mention removed.  Otherwise, it returns None.