patch applied (packages/base): Inline Data.Bits.rotate@Int, enables rotate to be constant folded

[Don Stewart]

simonpj:
> | > Maybe I should update the programming conventions wiki!
> |
> | Yep, that might be a good idea. Something about providing good text,
> | with reproducible examples, and then adding that text as a footnote in
> | the source.
> 
> OK: here's a draft to improve.
> 
> http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle
> 

Great, I like this idea for these particularly subtle/fragile issues,
that we may need to revisit 5-10 years down the track.

-- Don