(this is the only documentation so far)

predefined environments:
- verbatim
- alltt
- copy: simply copies its argument
- ignore: /dev/null

- tt
- lightblue-tt, lightgreen-tt, lightred-tt

- ocaml-tt
- ocaml-sf
- ocaml (mapped to ocaml-sf)

predefined macros:
- copy: simply copies its argument
- ignore: /dev/null

predefined options:
- color=yes
- vspacing=\medskip