a line from the itermapresult.py file was missing

docs/source/parallel/asyncresult.txt

@@ -105,7 +105,7 b' object), you can actually iterate through them, and act on the results as they a'
 
 .. literalinclude:: ../../examples/parallel/itermapresult.py
     :language: python
-    :lines: 20-66
+    :lines: 20-67
 
 .. seealso::