[GHC] #13823: Use NonEmpty lists in more places in the GHC API

[GHC]

#13823: Use NonEmpty lists in more places in the GHC API
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        Reporter:  RyanGlScott       |                Owner:  RyanGlScott
            Type:  task              |               Status:  closed
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.3
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8782             |  Differential Rev(s):  Phab:D3823
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * status:  patch => closed
 * resolution:   => fixed
 * milestone:   => 8.4.1


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13823#comment:6>
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