patch 8.2.1915: Vim9: error for wrong number of arguments is not useful

Problem:    Vim9: error for wrong number of arguments is not useful.
Solution:   Mention whatever we have for the name. (closes #7208)
diff --git a/src/vim9compile.c b/src/vim9compile.c
index 60b55d5..225d5d5 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -1687,12 +1687,12 @@
 
 	    if (argcount < type->tt_min_argcount - varargs)
 	    {
-		semsg(_(e_toofewarg), "[reference]");
+		semsg(_(e_toofewarg), name);
 		return FAIL;
 	    }
 	    if (!varargs && argcount > type->tt_argcount)
 	    {
-		semsg(_(e_toomanyarg), "[reference]");
+		semsg(_(e_toomanyarg), name);
 		return FAIL;
 	    }
 	}