Add a "See also:" link to the curses.ascii module.

Doc/lib/libcurses.tex

@@ -15,6 +15,9 @@ extension module has not been tested with all available versions of
 curses.
 
 \begin{seealso}
+  \seemodule{curses.ascii}{Utilities for working with \ASCII{}
+                           characters, regardless of your locale
+                           settings.}
   \seetext{Tutorial material on using curses with Python is available
            on the Python Web site as Andrew Kuchling's
 \citetitle[http://www.python.org/doc/howto/curses/curses.html]{Curses