[GHC] #7633: Checkable "minimal complete definitions"

[GHC]

#7633: Checkable "minimal complete definitions"
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        Reporter:  shachaf                       |            Owner:
            Type:  feature request               |           Status:  patch
        Priority:  normal                        |        Milestone:  7.8.1
       Component:  Compiler                      |          Version:  7.6.1
      Resolution:                                |         Keywords:
Operating System:  Unknown/Multiple              |     Architecture:
 Type of failure:  None/Unknown                  |  Unknown/Multiple
       Test Case:  warnings/minimal/WarnMinimal  |       Difficulty:
        Blocking:                                |  Unknown
                                                 |       Blocked By:
                                                 |  Related Tickets:  #6028
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Comment (by simonpj):

 Sorry I missed the bit about underscores.  Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7633#comment:43>
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