Cross reference the set built-ins with the sets module.

diff --git a/Doc/lib/libstdtypes.tex b/Doc/lib/libstdtypes.tex
index 740887de2f74b942348e265037ff5f7d4ae1bbc3..65e96bf0f7cf7f5bb597169e01906c438b76118a 100644 (file)
--- a/Doc/lib/libstdtypes.tex
+++ b/Doc/lib/libstdtypes.tex
@@ -1291,6 +1291,14 @@ Note, the non-operator versions of the \method{update()},
 \method{symmetric_difference_update()} methods will accept any iterable
 as an argument.
 
+The design of the set types was based on lessons learned from the
+\module{sets} module.
+     
+\begin{seealso}     
+  \seemodule[comparison-to-builtin-set]{sets}{Differences between
+     the \module{sets} module and the built-in set types.}                                           
+\end{seealso}
+     
 
 \subsection{Mapping Types --- class{dict} \label{typesmapping}}
 \obindex{mapping}