[docs] [issue9101] reference json format in file formats chapter

anatoly techtonik <techtonik@gmail.com> added the comment: Wow. That's much better - python makes progress. Does this `robot` stuff flies back to Roundup? Is it possible to specify "closes bug #9101" directly in commit message? ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue9101> _______________________________________