Sorry if this is a little off-topic. I have never seen the word “dingus” to refer to a program that demonstrates the input and output of a program or parser outside the context of markdown.
Yet, it seems like many people that write a markdown processor set up a “dingus” to show it off. Don’t get me wrong, I think they are great, even essential for new languages. However, I’m just curious where this started… Gruber?
It’s not documented in wikipedia or other slang language public records. If this is common parlance, please bring me up to speed. If not, what is the official definition of a “dingus” within this context?