[GHC] #9230: Make -fwarn-tabs the default

[GHC]

#9230: Make -fwarn-tabs the default
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              Reporter:  dfeuer      |            Owner:  mlen
                  Type:  feature     |           Status:  new
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.8.2
             Component:  Compiler    |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Easy (less than 1
  Unknown/Multiple                   |  hour)
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by mlen):

 I implemented this feature and a test case. Implementation took only few
 lines of code, but in order compile the compiler I needed to add quite a
 lot GHC_OPTIONS pragmas with -fno-warn-tabs (few git submodules were
 affected by this change). I have a week off and I won't have access to my
 computer, but I'll continue working on the patch when I get back.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9230#comment:6>
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