wsgi: Fix typo in comment.

caucase/wsgi.py

@@ -529,7 +529,7 @@ class Application(object):
           except KeyError:
             break
           del path_item_list[0]
-        # If this raises, it means the outing dict is inconsistent.
+        # If this raises, it means the routing dict is inconsistent.
         method_dict = path_entry_dict['method']
         request_method = environ['REQUEST_METHOD']
         try: