Add entry for the pydoc documentation.
diff --git a/Doc/lib/lib.tex b/Doc/lib/lib.tex
index 2557e59..f285dda 100644
--- a/Doc/lib/lib.tex
+++ b/Doc/lib/lib.tex
@@ -111,6 +111,7 @@
 \input{libunicodedata}
 
 \input{libmisc}                 % Miscellaneous Services
+\input{libpydoc}
 \input{libdoctest}
 \input{libunittest}
 \input{libmath}