Do not import the Prelude by default for proper modules

In a cross-posted thread starting:

• http://www.haskell.org/pipermail/libraries/2007-March/007236.html
• http://www.haskell.org/pipermail/haskell-cafe/2007-March/023826.html

it was proposed that a module beginning module Foo would not implicitly import the Prelude. Modules without this would still import the Prelude. Interactive environments would have the Prelude in scope unless they have loaded a module beginning module Foo.

In terms of changes to the report, 5.1 "Module Structure" would be changed to say that if no header is given then

module Main (main) where
import Prelude

is prepended.

See also #58 and Prelude.

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Trac field	Value
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Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Proposal
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