[GHC] #15189: Avoid word "transformer" in the documentation of ST

[GHC]

#15189: Avoid word "transformer" in the documentation of ST
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        Reporter:  ulysses4ever      |                Owner:  ulysses4ever
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Documentation     |              Version:  8.2.2
      Resolution:                    |             Keywords:  newcomer
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 ulysses4ever):

 Sorry for being so slow. Please, review.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15189#comment:4>
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