module namespaces with "Prelude"

[Simon Marlow]

> All in all, dropping all implicit directories from the search=20
> path gets my vote.

"me too". =20

I wasn't aware that Hugs did this, and GHCi certainly doesn't.  It's
reasonable to leave "." in the default search path, but adding an
implicit root for an imported module will certainly lead to trouble -
after all, we use hierarchical module names because the modules at the
leaves of the tree are expected to overlap.

Cheers,
	Simon