modified:   machine.py Machine.to_lisp_str(machine) added to have a recursive string representation of every machine (maybe to_dot is not needed anymore)
modified:   machine.py
Machine.to_lisp_str(machine) added to have a recursive string
representation of every machine
(maybe to_dot is not needed anymore)

recski/pymachine,recski/pymachine,kornai/pymachine,Eszti/pymachine,Eszti/pymachine,kornai/pymachine