#1411695: clarify behavior of xml.sax.utils.[un]escape.
diff --git a/Doc/library/xml.sax.utils.rst b/Doc/library/xml.sax.utils.rst
index 0585a9b..c796ca8 100644
--- a/Doc/library/xml.sax.utils.rst
+++ b/Doc/library/xml.sax.utils.rst
@@ -21,7 +21,8 @@
You can escape other strings of data by passing a dictionary as the optional
*entities* parameter. The keys and values must all be strings; each key will be
- replaced with its corresponding value.
+ replaced with its corresponding value. The characters ``'&'``, ``'<'`` and
+ ``'>'`` are always escaped, even if *entities* is provided.
.. function:: unescape(data[, entities])
@@ -30,7 +31,8 @@
You can unescape other strings of data by passing a dictionary as the optional
*entities* parameter. The keys and values must all be strings; each key will be
- replaced with its corresponding value.
+ replaced with its corresponding value. ``'&'``, ``'<'``, and ``'>'``
+ are always unescaped, even if *entities* is provided.
.. versionadded:: 2.3