Remove duplication.
diff --git a/Lib/cookielib.py b/Lib/cookielib.py
index 5b25090..65214df 100644
--- a/Lib/cookielib.py
+++ b/Lib/cookielib.py
@@ -1014,7 +1014,7 @@
                     (not erhn.startswith(".") and
                      not ("."+erhn).endswith(domain))):
                     _debug("   effective request-host %s (even with added "
-                           "initial dot) does not end end with %s",
+                           "initial dot) does not end with %s",
                            erhn, domain)
                     return False
             if (cookie.version > 0 or