What Happens With + Signs When We Put Them in the File Name

A Quote from Stanley Kubrick's Film of A Clockwork Orange, with references to "milk+"

Based on the novel by Anthony Burgess

There was me, that is Alex, and my three droogs, that is Pete, Georgie, and Dim, and we sat in the Korova Milkbar trying to make up our rassoodocks what to do with the evening. The Korova milkbar sold milk+, milk+ vellocet or synthemesc or drencrom, which is what we were drinking. This would sharpen you up and make you ready for a bit of the old ultra-violence.