[Haskell] Haddock ignores fixity declarations?

Hello, I just wanted to check the precedence of the (.) operator from Prelude (http://www.haskell.org/ghc/docs/latest/html/libraries/base/Prelude.html) and noticed with shock ;) that neither precedence levels nor fixity are documented. Is this a known limitation of haddock? How hard would it be to add this? Ben