We use "headers" (plural) in header.py, so we use "statuses" (plural) also in this case

Author: benediktjohannes

Lib/wsgiref/handlers.py

@@ -246,7 +246,7 @@ def start_response(self, status, headers,exc_info=None):
         status = self._convert_string_type(status, "Status")
 
         if _name_disallowed_re.search(status):
-            raise ValueError("Control characters are not allowed in status")
+            raise ValueError("Control characters are not allowed in statuses")
 
         self._validate_status(status)