pretty expr
(Scan
	[
		(Table "lineitem")
		(Cols "l_suppkey")
		(Index "lineitem@l_sk")
		(HardLimit $lineitem_rows)
	]
)
----
(Scan
    [
        (Table "lineitem")
        (Cols "l_suppkey")
        (Index "lineitem@l_sk")
        (HardLimit $lineitem_rows)
    ]
)

pretty expr
(Root
	(Scan
		[
			(Table "%s")
			(Cols "$cols")
			(HardLimit $rows)
		]
	)
	(Presentation "$cols")
	(NoOrdering)
)
----
(Root
    (Scan [ (Table "%s") (Cols "$cols") (HardLimit $rows) ])
    (Presentation "$cols")
    (NoOrdering)
)
