Lisp pretty printing was available in February 1973 (http://www.softwarepreservation.org/projects/LISP/MIT/AIM-27...).
That document states Bill Gosper wrote one of the first pretty printers, but doesn’t give a date for it.
I would think it is much older, as writing a simple lisp pretty-printer is easy and reading lisp without autoformatting is “less than ideal”.
Yup, Python clearly pioneered automatic code formatting. Nobody had done it before them...