Prepend function for Fish Shell

prepend.fish

function prepend -d "Prepends argv[1] to argv[-1]"
  set -l args $argv[2..-1]
  set -l text "$argv[1]"

  for arg in $args
    echo '' > $arg

    sed -i -e '1i\
  '"$text" $arg

    sed -i -e '$ {
    /^$/d
    }' $arg
  end
end