strange formatting behaviour with `#;` comments

[m4rch3n1ng]

consider the following scheme code:

(displayln #;(+ 1 2) 'test)

running raco fmt once produces the following:

#;(+ 1 2)
(displayln 'test)

and then running raco fmt again produces this:

#;
(
+
1
2
)
(displayln 'test)