In its usage message, kl claims to be vl. Fixed.

vl's code differs slightly from the others here.
I used vl's version, as it reduces variations.

Reference: /n/sources/patch/applied/kl-isnt-vl
Date: Mon Dec 10 18:25:47 CET 2012
Signed-off-by: a@9srv.net

--- /sys/src/cmd/kl/obj.c	Mon Dec 10 18:22:51 2012
+++ /sys/src/cmd/kl/obj.c	Mon Dec 10 18:22:50 2012
@@ -72,7 +72,7 @@
 	} ARGEND
 	USED(argc);
 	if(*argv == 0) {
-		diag("usage: vl [-options] objects");
+		diag("usage: %cl [-options] objects", thechar);
 		errorexit();
 	}
 	if(!debug['9'] && !debug['U'] && !debug['B'])