Fix #11491. When dbm.open was called with a file which already exists and
the "flag" argument is "n", dbm.error was being raised. As documented,
dbm.open(...,flag='n') will now "Always create a new, empty database,
open for reading and writing", regardless of a previous file existing.
diff --git a/Misc/ACKS b/Misc/ACKS
index a18dd18..c95e76d 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -154,6 +154,7 @@
Benjamin Collar
Jeffery Collins
Paul Colomiets
+Denver Coneybeare
Matt Conway
David M. Cooke
Greg Copeland