<fizzie> rm bin/bf; echo $\'#! /bin/bash\\n[[ $# > 0 ]] || { echo "Run what?"; exit 1; }\\nci="$*"\\necho -n "${ci#*!}" | echo /hackenv/interps/egobfi/src/egobfi8 <(echo -n "${ci%%!*}")\' > bin/bf; chmod +x bin/bf

An off by two error is what happens when you expect an off by one error but compensate in the wrong direction