Fix comment, mode really is used
diff --git a/Lib/dumbdbm.py b/Lib/dumbdbm.py
index b6b7fc3..d0e1e31 100644
--- a/Lib/dumbdbm.py
+++ b/Lib/dumbdbm.py
@@ -166,5 +166,5 @@
     will be modified by the prevailing umask).
 
     """
-    # flag, mode arguments are currently ignored
+    # flag argument is currently ignored
     return _Database(file, mode)