Now a from submitted via POST that also has a query string
will contain both FieldStorage and MiniFieldStorage items.

Fixes #1817.
diff --git a/Doc/library/cgi.rst b/Doc/library/cgi.rst
index 4c619e4..17cd750 100644
--- a/Doc/library/cgi.rst
+++ b/Doc/library/cgi.rst
@@ -165,6 +165,8 @@
 actually be instances of the class :class:`MiniFieldStorage`.  In this case, the
 :attr:`list`, :attr:`file`, and :attr:`filename` attributes are always ``None``.
 
+A form submitted via POST that also has a query string will contain both
+:class:`FieldStorage` and :class:`MiniFieldStorage` items.
 
 Higher Level Interface
 ----------------------