[GHC] #8993: Fold NullaryTypeClasses into MPTC

[GHC]

#8993: Fold NullaryTypeClasses into MPTC
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        Reporter:  owst              |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:  7.10.1
       Component:  Compiler          |          Version:  7.8.2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by Krzysztof Gogolewski <krz.gogolewski@…>):

 In [changeset:"e7b9c4125321308a7f71cacf4c24b7d40261ccfd/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="e7b9c4125321308a7f71cacf4c24b7d40261ccfd"
 Fixup nullary typeclasses (Trac #8993)

 Summary: Fix test broken after Trac #8993

 Test Plan: validate

 Reviewers: austin, simonpj, hvr

 Reviewed By: austin, hvr

 Subscribers: simonmar, relrod, carter

 Differential Revision: https://phabricator.haskell.org/D34
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8993#comment:10>
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