Commits on Aug 8, 2015

1. Export 'Showing' from Hoopl.Show …

   GHC Trac user nimnul reports in
   https://ghc.haskell.org/trac/ghc/ticket/10540:
   
     Hoopl exports
   
       showGraph :: Showing n -> Graph n e x -> String
   
     But it doesn't export Showing. This doesn't make sense, as it's a
     user-supplied function. So to know what I should pass to showGraph I can only
     look at the source. :i Showing doesn't work.
   
     Below is a patch to export the innocent type synonym:

   

   thomie committed Aug 8, 2015
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