<wob_jonas> perl -eopen$i,"<",($f="wisdom/aristotle");$_=<$i>; s/(fifth) kind of vitreous/$1/ or die; if (1) { open$o,">",$f; print$o $_ or die; } print substr$_,200;

`revert <rev>" can be used to revert to a revision. See <https://hackego.esolangs.org/fshg/>. It is a builtin command so cannot be called from other commands.