Haddock comment in single line export list breaks format

[brandonchinn178]

Describe the bug
A multiline haddock in a single line export list incorrectly changes to a single line haddock comment.

To Reproduce

module Foo ({- | asdf -} foo) where

Currently, formatting this with --unsafe returns:

module Foo (-- | asdf foo) where

Expected behavior
Should reformat to

module Foo
  ( -- | asdf
    foo
  ) where

or stay with multiline haddock

Environment

• OS name + version:
• Version of the code:

Additional context
Add any other context about the problem here.