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    # Add this to your ~/.config/fish/config.fish
    # Syntax:
    # To just rerun your last command, simply type '!!'
    # This forked version supports "sudo !!" via two functions.
    function !!
        eval $history[1] $argv
    end function
    
    function sudo
    if test $argv
        if test $argv = "!!"
            eval /usr/bin/sudo $history[1]
        else
            eval /usr/bin/sudo $argv
        end
    end
end