[GHC] #11529: Show instance of Char should print literals for non-ascii printable charcters

[GHC]

#11529: Show instance of Char should print literals for non-ascii printable
charcters
-------------------------------------+-------------------------------------
        Reporter:  nushio            |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.3
      Resolution:  invalid           |             Keywords:
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 thomie):

 GHCi could be changed to show unicode characters nicely by default. The
 code is in the function `tcUserStmt` in
 `compiler/typecheck/TcRnDriver.hs`.

 Expressions:
 {{{
         -- The plans are:
         --   A. [it <- e; print it]     but not if it::()
         --   B. [it <- e]
         --   C. [let it = e; print it]
 }}}

 Statements:
 {{{
         -- The plans are:
         --      [stmt; print v]         if one binder and not v::()
         --      [stmt]                  otherwise
 }}}

 Replace `print` by `putStrLn . uShow`, with a suitable `uShow`. That
 shouldn't break anyone's code.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11529#comment:7>
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