Document new behavior of isinstance() when using a type object.
diff --git a/Doc/libfuncs.tex b/Doc/libfuncs.tex
index 0211cec..0182dcb 100644
--- a/Doc/libfuncs.tex
+++ b/Doc/libfuncs.tex
@@ -308,9 +308,11 @@
\begin{funcdesc}{isinstance}{object, class}
Return true if the \var{object} argument is an instance of the
\var{class} argument, or of a (direct or indirect) subclass thereof.
-If \var{object} is not a class instance, the function always returns
-false. If \var{class} is not a class object, a \code{TypeError}
-exception is raised.
+Also return true if \var{class} is a type object and \var{object} is
+an object of that type. If \var{object} is not a class instance or a
+object of the given type, the function always returns false. If
+\var{class} is neither a class object nor a type object, a
+\code{TypeError} exception is raised.
\end{funcdesc}
\begin{funcdesc}{issubclass}{class1, class2}