Yes you are correct, it's not 100% clear, but fairly close I would say given the sentence.

The program below already does the right thing, but I have ....

During the composal of the node, the idea of including test ala Test::More occurred to me, but laziness got the better of me.

Anyway your idea with comments in the DATA section is nice and I will try to remember that.

Thanks for your input dws, as always mature and experienced in a particular way