Hi, thanks for a great tool!

I'm wondering if there's a way to ensure that files end with a newline, while using {:style :respect-nl}. Ideally I'd love to be able to configure zprint to trim all trailing newlines except one and add a trailing newline if it's missing. Based on #100 it looks like I might be able to get this behavior if I use {:parse {:interpose "\n\n"}} but ideally I'd like to not change spacing between forms, just at the end of the file.

I couldn't find this in the docs or in other issues, but sorry if I'm missing something totally obvious. Thanks!