Is your feature request specific to Fourmolu?

• Yes, this feature is not relevant to Ormolu

Describe the current + desired formatting

{-|
This example
@
  test
@
-}

Gets translated to

-- |
--This example
--@
--  test
--@

Which will result in a parse error on --@

I'd recommend it translate to

-- |
-- This example
-- @
--  test
-- @