<oerjan> ` echo \'121:122 194:196 770:771 1000:1001 1493 1497 2113:2114 3341:3343 4530:4531 5136:5137 5642:5643 5895 5897 8669:8678 9070:9071 9074:9075\' | xargs -n 1 >share/scowrevs

[[ "$1" == ?*//* ]] || { echo 'usage: sled file//script'; exit 1; }; key="${1%%//*}"; value="${1#*//}"; [[ -f "$key" ]] || { echo 'Rosebud!'; exit 1; }; sed -i "$value" "$key" ;