Doc fixes in Control.Exception

[Bas van Dijk]

I just noticed that my patch also changed the following:

--- |The thread is awiting to retry an STM transaction, but there are no
+-- |The thread is awaiting to retry an STM transaction, but there are no
 -- other references to any @TVar at s involved, so it can't ever continue.
 data BlockedIndefinitelyOnSTM = BlockedIndefinitelyOnSTM
     deriving Typeable
hunk ./GHC/IO/Exception.hs 94

However this should obviously not be 'awaiting' but 'waiting'.

Should I create a new patch or can you guys fix that?

Bas