`newtype` vs `type` formatting

[Flinner]

Is your feature request related to a problem? Please describe.
I am relatively new to Haskell, so I apologize in case I am the problem :)

Describe the solution you'd like
When formatting this:

newtype Html =
  Html String

type Title =
  String

it gets formatted as:

newtype Html
  = Html String

type Title =
  String

the equal sign placement bothers me, it isn't consistent between newtype and type, maybe this is intended behavior, I am not really sure

[amesgen]

Thanks for opening the issue! I think the historical reason for this is that newtype (as opposed to type) shares the formatting logic with data, and data with multiple constructors is often formatted with the = in the next line as it aligns with the |:

data Foo
  = Bar
  | Baz
  | Bam

However, that isn't a strong reason, and the inconsistency with type is indeed a bit weird.

[int-index]

The difference in formatting does not bother me because the way RHS works for newtype and type is quite different. Compare

newtype Html = H String
type    Html = H String

In case of a newtype, H is a newly introduced data constructor, a declaration site. In the type synonym case, it's the use site of type constructor H.

As you can't read those declarations the same way, I don't believe there is a strong case for making their layout similar.

[Flinner]

If it is intended behavior please close the issue, thanks!