concrete functor and monad transformers
#37transformers-0.5.3.0 and 0.5.3.1 missing Bifoldable/Bitraversable instances for Constant
I was going through transformers-compat and updating it for transformers-0.5.3 when I noticed something very unusual - the changes from http://hub.darcs.net/ross/transformers/patch/50a7a371428cc90aa0ce886d255956a32c0e092b (adding Bifoldable and Bitraversable instances for Constant) don't appear to have made it into either the transformers-0.5.3.0 or 0.5.3.1 releases on Hackage! Even more confusingly, patches made after 50a7a371428cc90aa0ce886d255956a32c0e092b (e.g., 1e05438be99b7d8e9a3d4c3747c2c23fdd790eac, which added SelectT) do appear in the 0.5.3.0 and 0.5.3.1 releases.
Do you know what happened?
