added description of StringTypes object

diff --git a/Doc/lib/libtypes.tex b/Doc/lib/libtypes.tex
index 35495eba6917637611dc4b5a045a8c2547cc422f..0bc55232c8480c534fc4a4d937efcb9cc02e2be4 100644 (file)
--- a/Doc/lib/libtypes.tex
+++ b/Doc/lib/libtypes.tex
@@ -155,3 +155,8 @@ The type of frame objects such as found in \code{tb.tb_frame} if
 The type of buffer objects created by the
 \function{buffer()}\bifuncindex{buffer} function.
 \end{datadesc}
+
+\begin{datadesc}{StringTypes}
+A list containing StringType and UnicodeTypes used to facilitate easier
+checking for any string object, e.g. \code{s in types.StringTypes}.
+\end{datadesc}