Describe the default_namespace parameter of ElemetTree.write.
diff --git a/Doc/library/xml.etree.elementtree.rst b/Doc/library/xml.etree.elementtree.rst
index c5c8802..d9b0a52 100644
--- a/Doc/library/xml.etree.elementtree.rst
+++ b/Doc/library/xml.etree.elementtree.rst
@@ -468,16 +468,18 @@
root element.
- .. method:: write(file, encoding="us-ascii", xml_declaration=None, method="xml")
+ .. method:: write(file, encoding="us-ascii", xml_declaration=None, \
+ default_namespace=None, method="xml")
Writes the element tree to a file, as XML. *file* is a file name, or a
- :term:`file object` opened for writing. *encoding* [1]_ is the output encoding
- (default is US-ASCII). Use ``encoding="unicode"`` to write a Unicode string.
- *xml_declaration* controls if an XML declaration
+ :term:`file object` opened for writing. *encoding* [1]_ is the output
+ encoding (default is US-ASCII). Use ``encoding="unicode"`` to write a
+ Unicode string. *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 or Unicode (default is None). *method* is
- either ``"xml"``, ``"html"`` or ``"text"`` (default is ``"xml"``).
- Returns an (optionally) encoded string.
+ for only if not US-ASCII or UTF-8 or Unicode (default is None).
+ *default_namespace* sets the default XML namespace (for "xmlns").
+ *method* is either ``"xml"``, ``"html"`` or ``"text"`` (default is
+ ``"xml"``). Returns an (optionally) encoded string.
This is the XML file that is going to be manipulated::