Not indented

    Four spaces

        Single tab

    Two indented lines after each other

    A long line that goes on and on and on and on and on and really is
    so lang that it will be wrapped at some point. Well, at least it
    should really be wrapped by now, because really, this is a long
    sentence, isn’t it?

    Four spaces

        Eight spaces

            Twelve spaces

        Eight spaces

    Four spaces
    
    Indented

Not indented

    Three spaces

