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Simon Peyton Jones authored
Arrange that when seeking instance decls in GHCi, in response to a :info command, we only print ones whose types are in scope unqualified. This eliminates an alarmingly long list when simply typing ':info Show', say. On the way, I reorganised a bit. GHCi printing happens by converting a TyThing to an IfaceDecl, and printing that. I now arrange to generate unqualifed IfaceExtNames directly during this conversion, based on what is in scope. Previously it was done during the pretty-printing part via the UserStyle. But this is nicer.
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