Add a link to the demo dir.
diff --git a/Doc/library/curses.rst b/Doc/library/curses.rst
index 11ab5d0..d2c2316 100644
--- a/Doc/library/curses.rst
+++ b/Doc/library/curses.rst
@@ -45,7 +45,7 @@
       Tutorial material on using curses with Python, by Andrew Kuchling and Eric
       Raymond.
 
-   The :file:`Tools/demo/` directory in the Python source distribution contains
+   The :source:`Tools/demo/` directory in the Python source distribution contains
    some example programs using the curses bindings provided by this module.