Add :term:s for iterator.
diff --git a/Doc/library/heapq.rst b/Doc/library/heapq.rst
index 2d38c26..bd4c79f 100644
--- a/Doc/library/heapq.rst
+++ b/Doc/library/heapq.rst
@@ -92,8 +92,8 @@
.. function:: merge(*iterables)
Merge multiple sorted inputs into a single sorted output (for example, merge
- timestamped entries from multiple log files). Returns an iterator over over the
- sorted values.
+ timestamped entries from multiple log files). Returns an :term:`iterator`
+ over over the sorted values.
Similar to ``sorted(itertools.chain(*iterables))`` but returns an iterable, does
not pull the data into memory all at once, and assumes that each of the input