Remove duplication.
diff --git a/Lib/http/cookiejar.py b/Lib/http/cookiejar.py
index 9d798e8..97383d6 100644
--- a/Lib/http/cookiejar.py
+++ b/Lib/http/cookiejar.py
@@ -1020,7 +1020,7 @@
                     (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