[3.9] [doc] Fix smtplib and xml.dom.minidom mark-up (GH-22769) (GH-23380)

diff --git a/Doc/library/xml.dom.minidom.rst b/Doc/library/xml.dom.minidom.rst
index 2c78cd9..bf72c46 100644
--- a/Doc/library/xml.dom.minidom.rst
+++ b/Doc/library/xml.dom.minidom.rst
@@ -132,7 +132,7 @@
           ... # Work with dom.
 
 
-.. method:: Node.writexml(writer, indent="", addindent="", newl="",
+.. method:: Node.writexml(writer, indent="", addindent="", newl="", \
                           encoding=None, standalone=None)
 
    Write XML to the writer object.  The writer receives texts but not bytes as input,
@@ -174,7 +174,7 @@
       The :meth:`toxml` method now preserves the attribute order specified
       by the user.
 
-.. method:: Node.toprettyxml(indent="\\t", newl="\\n", encoding=None,
+.. method:: Node.toprettyxml(indent="\\t", newl="\\n", encoding=None, \
                              standalone=None)
 
    Return a pretty-printed version of the document. *indent* specifies the