[Haskell-cafe] How can I stop GHCi from calling "show" for IOactions?

[Simon Peyton-Jones]

| I think a more consistent behavior would be to not print the LHS at
| all.  If you wanted to print the result of the computation you could
| just do:
|
|     Prelude> bar 5
|
| or, if you also wanted bound variables afterwards:
|
|     Prelude> (x, Just y) <- bar 5
|     Prelude> (x, Just y)

I've added Ryan's comments to
        http://hackage.haskell.org/trac/ghc/ticket/1721

Others might want to add further suggestions there.

Simon