concrete functor and monad transformers
#62Typo in readme of Control.Monad.Trans.Except
The issue is in the first line of the docs here: http://hackage.haskell.org/package/transformers-0.5.5.0/docs/Control-Monad-Trans-Except.html
"This monad transformer extends a monad with the ability throw exceptions."
It should be "...the ability to throw exceptions."
