[GHC] #15410: Fix typos in docs

[GHC]

#15410: Fix typos in docs
-------------------------------------+-------------------------------------
        Reporter:  v0d1ch            |                Owner:  v0d1ch
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Documentation     |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4979
       Wiki Page:                    |
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Comment (by Krzysztof Gogolewski <krz.gogolewski@…>):

 In [changeset:"932300bb55c8745aea7f29dc36b6d5021e6855c8/ghc" 932300b/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="932300bb55c8745aea7f29dc36b6d5021e6855c8"
 Fix some typos in docs

 Reviewers: bgamari, osa1

 Reviewed By: osa1

 Subscribers: rwbarton, thomie, carter

 GHC Trac Issues: #15410

 Differential Revision: https://phabricator.haskell.org/D4979
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15410#comment:5>
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