It's Scheme s-expressions. Parsers for it have existed for it longer than C or Unix have existed (Scheme came out in 1970, First Edition Unix in 1971), let alone Lisp parsers which have existed for even longer.

EDIT: Complaining about downvotes and then going on a tirade about how Lisp users are cave-dwellers is not constructive. Personally I think your argument was a valid concern (and I just went to try to find a Scheme parser in Python to help you), but you're not helping your case.

Also, like it or not, but both of the most widely-used editors (emacs and vim) both have turing-complete "configuration" languages. By your statements, that would make the majority of programmers academic cave-dwellers (oh wait... :P).