bot: forgot to exit after received SIGTERM…

edmond/bot.py

@@ -179,6 +179,7 @@ class Bot(irc.client.SimpleIRCClient, Logger):
     def handle_sigterm(self, *args):
         """Handle SIGTERM (keyboard interrupt, systemd stop, etc)."""
         self.cleanup()
+        exit("Exiting after received SIGTERM.")
 
     def cleanup(self):
         """Save the storage file and close the connection. Run only once."""