This patch ensures that the pydoc_data package gets installed. This is needed

to make it possible to use pydoc to get access to the language reference.

That is, without this patch the folllowing won't work:

   >>> help('if')

Makefile.pre.in

@@ -837,7 +837,7 @@ LIBSUBDIRS=	lib-tk site-packages test test/output test/data \
 		distutils distutils/command distutils/tests $(XMLLIBSUBDIRS) \
 		multiprocessing multiprocessing/dummy \
 		lib-old \
-		curses $(MACHDEPS)
+		curses pydoc_data $(MACHDEPS)
 libinstall:	build_all $(srcdir)/Lib/$(PLATDIR)
 	@for i in $(SCRIPTDIR) $(LIBDEST); \
 	do \