The signature of org-export-filter functions is
(data backend info). I want to write a function that will know if I'm exporting to ascii or latin1 or utf-8. The backend appears to be
'ascii no matter which of the text options I'm using, so I'm wondering what is in the info data.
I'm very new to lisp of any sort so I don't even know how to think about
info here. Is that an object, a struct, or something else? How do I dig into it?
I haven't been able to find reference documentation that describes that data structure, I'd be interested if anyone can point me to that.