[commit: ghc] type-nats's head updated: Merge remote-tracking branch 'origin/master' into type-nats (3d0cf09)

[Iavor Diatchki]

Repository : ssh://darcs.haskell.org//srv/darcs/ghc

Branch 'type-nats' now includes:

     c1e928e... Comments only
     4674a23... Fix bug in expandTypeSynonyms that could rarely cause problems
     d0f3a8b... Handle cases with no alternatives in GHCi
     fc8959a... Refactor LHsTyVarBndrs to fix Trac #6081
     9806a0a... Delete dead code mkIParamTyCon
     09addd3... Merge branch 'master' of http://darcs.haskell.org/ghc
     3d0cf09... Merge remote-tracking branch 'origin/master' into type-nats