Add :nbstart and :nbclose.
diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index 488feae..1ef885a 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -621,6 +621,10 @@
 			RANGE|NOTADR|BANG|FILES|EDITCMD|ARGOPT|TRLBAR),
 EX(CMD_nbkey,		"nbkey",	ex_nbkey,
 			EXTRA|NOTADR|NEEDARG),
+EX(CMD_nbclose,		"nbclose",	ex_nbclose,
+			TRLBAR|CMDWIN),
+EX(CMD_nbstart,		"nbstart",	ex_nbstart,
+			WORD1|TRLBAR|CMDWIN),
 EX(CMD_new,		"new",		ex_splitview,
 			BANG|FILE1|RANGE|NOTADR|EDITCMD|ARGOPT|TRLBAR),
 EX(CMD_nmap,		"nmap",		ex_map,