if [[ "$1" =~ ^[0-9]+$ ]]; then
  rev="$(hg blame quotes | sed "$1{s/^ *//;s/:.*//;q};d")"
  if [[ -n "$rev" ]]; then
    hg log -r "$rev" -T "{desc}"
  else
    echo "$1: no such quote"
  fi
else
  echo "usage: \`whoq N"
fi