[GHC] #12382: Rename clasing type variables more consistently

[GHC]

#12382: Rename clasing type variables more consistently
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        Reporter:  nomeata           |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  low               |            Milestone:
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |
      Resolution:                    |             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 nomeata):

 Fun fact: HEAD hands out numbers in an unexpected order:
 {{{
 Prelude> :t (id,id,id)
 (id,id,id) :: (a2 -> a2, a1 -> a1, a -> a)
 }}}
 This was the other (better?) way around in 7.10. Did not check 8.0.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12382#comment:4>
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