Possible tiny mispelling?

I am studying your code with great interest, it is quite inspiring. I saw a possible tint misspelling [here](https://github.com/susam/susam.net/blob/main/roll.lisp#L66) you might wish to double check. As a side note, may I ask what kind of template system are you using? It seems similar to [Djula](https://github.com/mmontone/djula)?