Use Data.Bifunctor.bimap as it is now available on bootstrapping GHC.
Use Data.Bifunctor.bimap as it is now available on bootstrapping GHC.

sdiehl/ghc,snowleopard/shaking-up-ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,snowleopard/hadrian,bgamari/shaking-up-ghc,izgzhen/hadrian