<oerjan> le/rn scowrevs///hackenv/share/scowrevs is a list of repository revision ranges that affected a lot of files but in the end changed nothing (usually because of a revert at the end). Most of our custom repository lookup commands ignore these to reduce noise.

tr -dc "AB,.<>+-"</dev/urandom|fold -w"${1-50}"|sed -n ":a;s/A\([^B]*\)B/[\1]/;ta;/[AB]/b;p;q"