[project @ 1999-05-11 16:33:35 by keithw]
(this is number 3 of 9 commits to be applied together) Following Haskell 98, if the module declaration is omitted it now defaults to "module Main(main) where", rather than the previous default of exporting everything. Furthermore, "module Main where" also defaults to exporting just Main.main rather than everything in the module (modules other than Main behave as normal). This permits the usage inference to give better results for the Main module, since exported functions get worse types than nonexported functions.
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