Remove record notation for queries without arguments

[brandon-leapyear]

Queries without arguments currently render as

{-----------------------------------------------------------------------------
* getCharacters

-- result :: Object GetCharactersSchema; throws a GraphQL exception on errors
result <- runQuery GetCharactersQuery
  {
  }

-- result :: GraphQLResult (Object GetCharactersSchema)
result <- runQuerySafe GetCharactersQuery
  {
  }
-----------------------------------------------------------------------------}

data GetCharactersQuery = GetCharactersQuery
  {
  }
  deriving (Show)

It'd be nice to get rid of those braces and just be like data GetCharactersQuery = GetCharactersQuery