[GHC] #13839: GHCi warnings do not respect the default module header

[GHC]

#13839: GHCi warnings do not respect the default module header
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        Reporter:  Feuerbach         |                Owner:  RolandSenn
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:  make test
                                     |  TEST=T13839
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5449
       Wiki Page:                    |
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Comment (by RolandSenn):

 @osa1 No Problem! I‘ll move the Patch to Gitlab next week, after my ski
 holidays.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13839#comment:8>
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