[Haddock] [haddock] #212: Investigate unexpected change with (Monad (Either e)) instance

[haddock]

#212: Investigate unexpected change with (Monad (Either e)) instance
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Reporter:  SimonHengel  |       Owner:     
    Type:  task         |      Status:  new
Priority:  major        |   Milestone:     
 Version:               |    Keywords:     
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 see:
 https://github.com/ghc/haddock/commit/47e6c8e77a4b8edbb1e4869ba5a0f76ee71ad8bb

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Ticket URL: <http://trac.haskell.org/haddock/ticket/212>
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