Add information about adding the portability statement.
diff --git a/Doc/templates/module.tex b/Doc/templates/module.tex
index 4bb8013..84871aa 100644
--- a/Doc/templates/module.tex
+++ b/Doc/templates/module.tex
@@ -13,7 +13,7 @@
% appropriate.
\section{\module{spam} ---
- Short descrition, for section title.}
+ Short descrition, for section title}
% Choose one of these to specify the module module name. If there's
% an underscore in the name, use
@@ -24,6 +24,15 @@
\declaremodule{extension}{spam} % not standard, in C
\declaremodule{}{spam} % not standard, in Python
+% Portability statement: Uncomment and fill in the parameter to specify the
+% availability of the module. The parameter can be Unix, IRIX, SunOS, Mac,
+% Windows, or lots of other stuff. When ``Mac'' is specified, the availability
+% statement will say ``Macintosh'' and the Module Index may say ``Mac''.
+% Please use a name that has already been used whenever applicable. If this
+% is omitted, no availability statement is produced or implied.
+%
+% \platform{UNIX}
+
% These apply to all modules:
\moduleauthor{name}{email} % Author of the module code;