Fix typo introduced in GH-7217 (#7230)

elprans · 1st1 · commit dec947ca26bd · 2018-05-29T20:14:59.000-04:00
diff --git a/Doc/library/asyncio-task.rst b/Doc/library/asyncio-task.rst
@@ -769,7 +769,7 @@ Task functions
    +-----------------------------+----------------------------------------+
 
    Unlike :func:`~asyncio.wait_for`, ``wait()`` will not cancel the futures
-   when a timeout accurs.
+   when a timeout occurs.
 
    This function is a :ref:`coroutine <coroutine>`.
 
