DataTypes style

[wdanilo]

Hello! It would be great to add option to style DataTypes and other structures, for example:

data Point = Point
    { pointX :: Double, pointY :: Double
    , pointName :: String
    } 
    deriving (Show)

should be changed to the following (or simmilar):

data Point = Point { pointX    :: Double
                   , pointY    :: Double
                   , pointName :: String
                   } deriving (Show)

Additional the ability to enable or disable some pretification parts would be very usefull - for example, some users would not like to put types in the same column (like in my example)

[dsvensson]

...or even having the trailing } deriving (Show) on the same line as pointName?

[EncodePanda]

Hi, we've recently added a feature to format record syntax (https://github.com/jaspervdj/stylish-haskell/pull/256). It works a bit different than what you've proposed, but an option can be added to adhere to your proposal.