Issue #19795: Mark up None as literal text.
diff --git a/Doc/library/xml.etree.elementtree.rst b/Doc/library/xml.etree.elementtree.rst
index 20cfc4c..a431b0f 100644
--- a/Doc/library/xml.etree.elementtree.rst
+++ b/Doc/library/xml.etree.elementtree.rst
@@ -639,7 +639,7 @@
.. method:: clear()
Resets an element. This function removes all subelements, clears all
- attributes, and sets the text and tail attributes to None.
+ attributes, and sets the text and tail attributes to ``None``.
.. method:: get(key, default=None)
@@ -855,8 +855,8 @@
Writes the element tree to a file, as XML. *file* is a file name, or a
file object opened for writing. *encoding* [1]_ is the output encoding
(default is US-ASCII). *xml_declaration* controls if an XML declaration
- should be added to the file. Use False for never, True for always, None
- for only if not US-ASCII or UTF-8 (default is None). *default_namespace*
+ should be added to the file. Use False for never, True for always, ``None``
+ for only if not US-ASCII or UTF-8 (default is ``None``). *default_namespace*
sets the default XML namespace (for "xmlns"). *method* is either
``"xml"``, ``"html"`` or ``"text"`` (default is ``"xml"``). Returns an
encoded string.