Issue #7061: Dropped "for Tk" from turtle module title and moved its
doc section under frameworks.  Also fixed a couple of markup issues
that affected TOC rendering.
diff --git a/Doc/library/ast.rst b/Doc/library/ast.rst
index 5e2336f..66b29e0 100644
--- a/Doc/library/ast.rst
+++ b/Doc/library/ast.rst
@@ -1,7 +1,5 @@
-.. _ast:
-
-Abstract Syntax Trees
-=====================
+:mod:`ast` --- Abstract Syntax Trees
+====================================
 
 .. module:: ast
    :synopsis: Abstract Syntax Tree classes and manipulation.