Proposal: overhaul System.Process

[Neil Mitchell]

Hi

> Neil Mitchell and David Roundy argued against separating stdout and stderr
> for readProcessWithExitCode.  Myself I don't have a strong opinion -
> although I'm somewhat swayed by Brian's points.  It does seem slightly
> cleaner to separate the two in the default API.  Any more opinions?

After reading Brian's arguments, I'm not convinced I was right.

I still think it would be a shame if people just ignored the stderr,
and blindly missed the errors which happened there, but I'm not overly
convinced that interspersing them with stdout makes them any more
visible.

Thanks

Neil