Issue #8844: Regular and recursive lock acquisitions can now be interrupted
by signals on platforms using pthreads.  Patch by Reid Kleckner.
diff --git a/Doc/library/_thread.rst b/Doc/library/_thread.rst
index c087c75..369e9cd 100644
--- a/Doc/library/_thread.rst
+++ b/Doc/library/_thread.rst
@@ -137,6 +137,10 @@
    .. versionchanged:: 3.2
       The *timeout* parameter is new.
 
+   .. versionchanged:: 3.2
+      Lock acquires can now be interrupted by signals on POSIX.
+
+
 .. method:: lock.release()
 
    Releases the lock.  The lock must have been acquired earlier, but not