[GHC] #3191: hpc reports spurious results with .lhs files even after processing with ghc -E

[GHC]

#3191: hpc reports spurious results with .lhs files even after processing with ghc
-E
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    Reporter:  dominic           |        Owner:  andy at galois.com 
        Type:  bug               |       Status:  new             
    Priority:  normal            |    Milestone:                  
   Component:  Code Coverage     |      Version:  6.10.2          
    Severity:  normal            |   Resolution:                  
    Keywords:                    |   Difficulty:  Unknown         
    Testcase:                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |  
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Changes (by igloo):

  * difficulty:  => Unknown

Comment:

 See also #2991.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3191#comment:1>
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