Add entry for the pydoc documentation.
diff --git a/Doc/Makefile.deps b/Doc/Makefile.deps
index 4e48d83..ee76b22 100644
--- a/Doc/Makefile.deps
+++ b/Doc/Makefile.deps
@@ -102,6 +102,7 @@
 	lib/libgc.tex \
 	lib/libweakref.tex \
 	lib/libinspect.tex \
+	lib/libpydoc.tex \
 	lib/libdifflib.tex \
 	lib/libdoctest.tex \
 	lib/libunittest.tex \