an improper number of arguments is passed, rather output a line
telling the user how to get the help output.
# get subcommand
COMMAND="$1"
-[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
+[ "$COMMAND" ] || $PGRM help
shift
case $COMMAND in
# get subcommand
COMMAND="$1"
-[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
+[ "$COMMAND" ] || $PGRM help
shift
case $COMMAND in
# get subcommand
COMMAND="$1"
-[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
+[ "$COMMAND" ] || $PGRM help
shift
case $COMMAND in