Repeat most recent command in fish

!!

    # Add this to your ~/.config/fish/config.fish
    # Syntax:
    # To just rerun your last command, simply type '!!'
    # '!! sudo' will prepend sudo to your most recent command
    # Running !! with anything other than sudo will append the argument to your most recent command
    # To add another command to prepend list remove the # on line 10 and put the command in the quotes. Repeat as needed
    function !!;
      set prevcmd (history | head -n 1)
      if test "$argv"
        if test "$argv" = "sudo"        #; or "any other command you want to prepend"
            eval "$argv $prevcmd"
        else
            eval "$var $argv"
        end
        else
            eval "$var"
      end
    end