Table of Contents (Chapter Sections) on HTML-page is lacking the top-level headers

[rogererens]

On the book's HTML version, the Chapter Sections that acts as a table of content is lacking the headers

• Introduction
• Your first script
• Working with files
• Creating an interface for your script
• etc.

which are preceded with a single * or surrounded by single =s in the README.adoc or README.org files.