Consistency check for versionadded/changed directives.
diff --git a/Doc/library/threading.rst b/Doc/library/threading.rst
index 33cae1e..497a56f 100644
--- a/Doc/library/threading.rst
+++ b/Doc/library/threading.rst
@@ -166,6 +166,7 @@
 
    .. versionadded:: 3.2
 
+
 Detailed interfaces for the objects are documented below.
 
 The design of this module is loosely based on Java's threading model. However,
@@ -386,6 +387,7 @@
    .. versionchanged:: 3.2
       The *timeout* parameter is new.
 
+
 .. method:: Lock.release()
 
    Release a lock.