fix-take.dpatch

Tue Oct  6 16:59:24 PDT 2009  Echo Nolan <echo@echonolan.net>
  * Fix Iter.take delaying actions one step.
  It was broken in two maddeninly subtle ways. The first: using joinIM delayed
  all actions associated with take's parameter iteratee one step. The second:
  it always returned Cont when the length of the chunk was <= the requested
  length and non-null. Thus, the values returned were one step delayed if the
  amount to take was equal to the length of the chunk passed.

New patches:

[Fix Iter.take delaying actions one step.
Echo Nolan <echo@echonolan.net>**20091006235924
 Ignore-this: 2aa35f357f778727c2cc6c90e9cabd62
 It was broken in two maddeninly subtle ways. The first: using joinIM delayed
 all actions associated with take's parameter iteratee one step. The second:
 it always returned Cont when the length of the chunk was <= the requested
 length and non-null. Thus, the values returned were one step delayed if the
 amount to take was equal to the length of the chunk passed.
] hunk ./src/Data/Iteratee/Base.hs 477
   where
   step n chk@(Chunk str)
     | SC.null str = return $ Cont (take n iter) Nothing
-    | SC.length str <= n = return $ Cont (joinIM inner) Nothing
+    | SC.length str < n = liftM (flip Cont Nothing) inner
       where inner = liftM (check (n - SC.length str)) (runIter iter chk)
   step n (Chunk str) = done (Chunk s1) (Chunk s2)
     where (s1, s2) = SC.splitAt n str

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Patch bundle hash:
d1dd857cac6291fef3d312876811bc3e78bb4aef