Fix J.Tibell style for record syntax: add line before '}'

https://github.com/tibbe/haskell-style-guide/blob/master/haskell-style.md

```haskell
data Person = Person
    { firstName :: !String  -- ^ First name
    , lastName  :: !String  -- ^ Last name
    , age       :: !Int     -- ^ Age
    } deriving (Eq, Show)
```