[m-rev.] diff: private_builtin should not import io, step 3

[Julien Fischer]

Hi Zoltan,

On Thu, 11 Dec 2014, Zoltan Somogyi wrote:

> I committed step 2 earlier today. Please tell me when you have
> installed that step, so I can commit this one.

I think you can go ahead and commit this now -- anyone who hasn't
updated by now can re-install from one of the recent source
distributions.

Cheers,
Julien