Create _ast module.
Cleanup Python-ast.c generation.
diff --git a/Doc/lib/lib.tex b/Doc/lib/lib.tex
index 44e7c96..fad8fe7 100644
--- a/Doc/lib/lib.tex
+++ b/Doc/lib/lib.tex
@@ -416,6 +416,7 @@
 \input{distutils}
 
 \input{compiler}                % compiler package
+\input{libast}
 
 \input{libmisc}                 % Miscellaneous Services
 \input{libformatter}