#759525: document that dir() doesn't return metaclass attrs when given a class as arg.
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 6720f19..4f86fc7 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -302,7 +302,8 @@
Because :func:`dir` is supplied primarily as a convenience for use at an
interactive prompt, it tries to supply an interesting set of names more than it
tries to supply a rigorously or consistently defined set of names, and its
- detailed behavior may change across releases.
+ detailed behavior may change across releases. For example, metaclass attributes
+ are not in the result list when the argument is a class.
.. function:: divmod(a, b)