[GHC] #8375: Fix typo in sync-all script.

[GHC]

#8375: Fix typo in sync-all script.
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       Reporter:  leroux            |             Owner:
           Type:  bug               |            Status:  new
       Priority:  lowest            |         Milestone:
      Component:  Build System      |           Version:  7.6.3
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  Documentation bug
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 sync-all
 {{{
 -        print "\nWarning: You trying to 'pull' while on branch
 '$branch'.\n"
 +        print "\nWarning: You are trying to 'pull' while on branch
 '$branch'.\n"
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8375>
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