Unpaginated text not just as an option but as default

[emanjon]

Both the RFC-Editor and the datatracker webpages use unpaginated as the plain text format nowadays. Author-tools should just do the same. As unpaginated is the new IETF standard format for plain text, it is a bit strange that author-tools does not even support it.

(But please keep paginated text as an option. I would like a text+pdf option as well)