[GHC] #10662: GHC warning shows technical summary of AST instead of the user's code

[GHC]

#10662: GHC warning shows technical summary of AST instead of the user's code
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        Reporter:  kolmodin          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.10.2-rc2
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by ak3n):

 Replying to [comment:1 simonpj]:
 > Solution: when printing typechecked code, suppress details generated by
 the type checker itself.
 Excuse me, but how to suppress details? Is there a function for this?

 I found a warning generation function
 [https://ghc.haskell.org/trac/ghc/browser/ghc/compiler/deSugar/DsExpr.hs#L1003
 badMonadBind]. On which step do we need to suppress them ― `HsExpr` or
 `SDoc`?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10662#comment:6>
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