KISS principle please.Let the poster beware and check their entry. Someone keeps telling us we are all adults here. If you want to intend what you write then check it first. Don't rely on a machine - be an adult and responsible.
Try to solve one issue but open a pandora's box? What is the answer to spaces between other digits? Another substitute function test?
Enough of this save the world from itself.
What is the function answer to saving this invalid PIN [ ^ = space]? DJPT 1^ 01.11^ 5
Maybe ask also if three decimal places is a valid tip if you are in doubt.
