patch applied (cabal): Revert the other `fmap` to (.)

[Ross Paterson]

On Thu, May 01, 2008 at 04:01:31AM -0700, Malcolm Wallace wrote:
> Thu May  1 04:00:06 PDT 2008  Malcolm.Wallace at cs.york.ac.uk
>   * Revert the other `fmap` to (.)
>   To avoid needing a non-H'98 instance of Functor for (->).
> 
>     M ./Distribution/Simple/Command.hs -1 +1

I'm puzzled as to why nhc98 lacks this instance in this module,
given the import chain

Distribution.Simple.Command
-> Distribution.ParseUtils
-> Data.Tree
-> Control.Applicative
-> Control.Monad.Instances