[GHC] #8592: FunDep error message regression

[GHC]

#8592: FunDep error message regression
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        Reporter:  nomeata                  |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  normal                   |        Milestone:
       Component:  Compiler (Type checker)  |          Version:  7.7
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  None/Unknown             |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Comment (by nomeata):

 Branch `wip/T592` contains some refactoring of the `FunDeps` code that I
 don’t want to push to master before this issue is cleared, and the code
 tested.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8592#comment:1>
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