# check -version
case `prompter -v` in
prompter\ --*) ;;
- * ) printf "$0: prompter -v generated unexpected output\n" >&2
- failed=`expr ${failed:-0} + 1`;;
+ * ) printf '%s: prompter -v generated unexpected output\n' "$0" >&2
+ failed=`expr ${failed:-0} + 1`;;
esac
# check unknown switch