Clarified documentation on use of shutdown().
diff --git a/Doc/library/logging.rst b/Doc/library/logging.rst
index 0b2181c..44979f8 100644
--- a/Doc/library/logging.rst
+++ b/Doc/library/logging.rst
@@ -732,7 +732,8 @@
.. function:: shutdown()
Informs the logging system to perform an orderly shutdown by flushing and
- closing all handlers.
+ closing all handlers. This should be called at application exit and no
+ further use of the logging system should be made after this call.
.. function:: setLoggerClass(klass)