Merge heads.
diff --git a/Doc/library/logging.rst b/Doc/library/logging.rst
index f3fda14..68e359e 100644
--- a/Doc/library/logging.rst
+++ b/Doc/library/logging.rst
@@ -837,8 +837,10 @@
    effect is to disable all logging calls of severity *lvl* and below, so that
    if you call it with a value of INFO, then all INFO and DEBUG events would be
    discarded, whereas those of severity WARNING and above would be processed
-   according to the logger's effective level. To undo the effect of a call to
-   ``logging.disable(lvl)``, call ``logging.disable(logging.NOTSET)``.
+   according to the logger's effective level. If
+   ``logging.disable(logging.NOTSET)`` is called, it effectively removes this
+   overriding level, so that logging output again depends on the effective
+   levels of individual loggers.
 
 
 .. function:: addLevelName(lvl, levelName)