[GHC] #9822: Add displayException to Exception typeclass

[GHC]

#9822: Add displayException to Exception typeclass
-------------------------------------+-------------------------------------
              Reporter:  snoyberg    |            Owner:  snoyberg
                  Type:  feature     |           Status:  new
  request                            |        Milestone:  7.10.1
              Priority:  normal      |          Version:
             Component:              |         Keywords:
  libraries/base                     |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Easy (less than 1
      Operating System:              |  hour)
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
Changes (by snoyberg):

 * version:  7.9 =>
 * milestone:   => 7.10.1


--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9822#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler