updated for version 7.4.083
Problem:    It's hard to avoid adding a used pattern to the search history.
Solution:   Add the ":keeppatterns" modifier. (Christian Brabandt)
diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index 86bcead..6cc4c7e 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -477,6 +477,8 @@
 			NEEDARG|EXTRA|NOTRLCOM),
 EX(CMD_keepjumps,	"keepjumps",	ex_wrongmodifier,
 			NEEDARG|EXTRA|NOTRLCOM),
+EX(CMD_keeppatterns,	"keeppatterns",	ex_wrongmodifier,
+			NEEDARG|EXTRA|NOTRLCOM),
 EX(CMD_keepalt,		"keepalt",	ex_wrongmodifier,
 			NEEDARG|EXTRA|NOTRLCOM),
 EX(CMD_list,		"list",		ex_print,