patch applied (ghc-fc): Make newtype Coercion eta-contract if the tails of lhs and rhs match up

[Kevin Donnelly]

Thu Aug  3 09:26:52 PDT 2006  kevind at bu.edu
  * Make newtype Coercion eta-contract if the tails of lhs and rhs match up

    M ./compiler/types/Coercion.lhs -4 +36
    M ./compiler/types/TyCon.lhs -5 +13