In the example:

  (foo [1 2 3
        4 5 6
        7 8 9])

How does one change it to:

  (foo [1 2 3]
       [4 5 6]
       [7 8 9])

?

edit: Ah, it works if you put all the forms on one line. I suppose it would be considered non-standard to indent that particular syntax in such a way.