[GHC] #8496: Minor typos in STM.c

[GHC]

#8496: Minor typos in STM.c
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        Reporter:  aske        |            Owner:  aske
            Type:  bug         |           Status:  new
        Priority:  lowest      |        Milestone:
       Component:  Compiler    |          Version:  7.6.3
      Resolution:              |         Keywords:
Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple             |       Difficulty:  Easy (less than 1 hour)
 Type of failure:              |       Blocked By:
  None/Unknown                 |  Related Tickets:
       Test Case:              |
        Blocking:              |
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Comment (by Krzysztof Gogolewski <krz.gogolewski@…>):

 In [changeset:"d943affc9121b91bc14e3798c6a2f1a5da38aef0/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="d943affc9121b91bc14e3798c6a2f1a5da38aef0"
 Minor typos (fixes #8496)
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8496#comment:2>
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