[GHC] #1966: Incorrect Outputable instance for InstDecl

[GHC]

#1966: Incorrect Outputable instance for InstDecl
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 Reporter:  guest     |          Owner:  igloo      
     Type:  merge     |         Status:  new        
 Priority:  normal    |      Milestone:             
Component:  Compiler  |        Version:             
 Severity:  normal    |     Resolution:             
 Keywords:            |     Difficulty:  Easy (1 hr)
 Testcase:  ppr001    |   Architecture:  Multiple   
       Os:  Multiple  |  
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Comment (by dfranke):

 By the way, it occurs to me that an effective way to smoke out any other
 bugs of a similar nature would be to take some large Haskell projects,
 probably including GHC itself, and:

 1. Parse them
 2 Pretty-print them
 3. Reparse the output
 4. Pretty-print again

 and verify that step 3 succeeds and the outputs of steps 2 and 4 match.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1966#comment:5>
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