<kspalaiologos> ` cat > ../wisdom/kspalaiologos <<<"kspalaiologos is a brainfuck addict and a late night Perl hacker. He\'s secretly disassembling brainfuck code for a casino that lost the source code. Apparently knows the secret of Malbolge."

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