[GHC] #8342: System.Directory.getPermissions does not work well on Windows 7

[GHC]

#8342: System.Directory.getPermissions does not work well on Windows 7
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              Reporter:  freizl      |            Owner:  leroux
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Core        |          Version:  7.4.1
  Libraries                          |         Keywords:
            Resolution:              |     Architecture:  x86_64 (amd64)
      Operating System:  Windows     |       Difficulty:  Unknown
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by ekmett):

 I'd think we'd want `directory` to just do the right thing and normalize
 before handing it off to the OS on windows.

 All the other platforms deal gracefully with trailing slashes.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8342#comment:9>
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