[commit: ghc] master: Fix typo (a9bf7d4)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/a9bf7d42bb31d66e8669546e47191961bc03da03/ghc

>---------------------------------------------------------------

commit a9bf7d42bb31d66e8669546e47191961bc03da03
Author: 5outh <bkovach13 at gmail.com>
Date:   Thu Jun 22 10:29:53 2017 -0400

    Fix typo


>---------------------------------------------------------------

a9bf7d42bb31d66e8669546e47191961bc03da03
 libraries/base/GHC/Conc/Sync.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/base/GHC/Conc/Sync.hs b/libraries/base/GHC/Conc/Sync.hs
index 44d34d8..f9514d6 100644
--- a/libraries/base/GHC/Conc/Sync.hs
+++ b/libraries/base/GHC/Conc/Sync.hs
@@ -731,7 +731,7 @@ atomically (STM m) = IO (\s -> (atomically# m) s )
 -- values in TVars which mean that it should not continue (e.g. the TVars
 -- represent a shared buffer that is now empty).  The implementation may
 -- block the thread until one of the TVars that it has read from has been
--- udpated. (GHC only)
+-- updated. (GHC only)
 retry :: STM a
 retry = STM $ \s# -> retry# s#