Make PyIter_Next() a little smarter (wrt its knowledge of iterator
internals) so clients can be a lot dumber (wrt their knowledge).
diff --git a/Include/abstract.h b/Include/abstract.h
index 1dae5f1..ac9e568 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -484,9 +484,8 @@
      DL_IMPORT(PyObject *) PyIter_Next(PyObject *);
      /* Takes an iterator object and calls its tp_iternext slot,
 	returning the next value.  If the iterator is exhausted,
-	this can return NULL without setting an exception, *or*
-	NULL with a StopIteration exception.
-	NULL with any other exception  means an error occurred. */
+	this returns NULL without setting an exception.
+	NULL with an exception means an error occurred. */
 
 /*  Number Protocol:*/