Newtype ScalaDoc comment does not appear in generated HTML API documentation

[alexcardell]

ScalaDoc comments on Newtypes don't appear in the generated output. The HTML lists it as type as with a normal type alias, but does not apply the documentation.

Example:

  /** Example type doc
   */
  type X1 = Int

  /** Example newtype doc won't appear
   */
  @newtype case class X2(int: Int)

Output: