Add entry for the pydoc documentation.

Doc/Makefile.deps

@@ -102,6 +102,7 @@ LIBFILES= $(MANSTYLES) $(INDEXSTYLES) $(COMMONTEX) \
 	lib/libgc.tex \
 	lib/libweakref.tex \
 	lib/libinspect.tex \
+	lib/libpydoc.tex \
 	lib/libdifflib.tex \
 	lib/libdoctest.tex \
 	lib/libunittest.tex \

Doc/lib/lib.tex

@@ -111,6 +111,7 @@ and how to embed it in other applications.
 \input{libunicodedata}
 
 \input{libmisc}                 % Miscellaneous Services
+\input{libpydoc}
 \input{libdoctest}
 \input{libunittest}
 \input{libmath}