[WiP] New ToC generator based on querying the docbook XML

Get the table-of-contents item depth

gen-toc-based-on-docbook5.py

@@ -42,7 +42,7 @@ def _process_sections():
                     parent = parent.getparent()
                 assert count_parent_section_elements > 0
                 output_text += "{}* [{}](#{})\n".format(
-                    ("    " * (count_parent_section_elements - 1)),
+                    (" " * (4 * (count_parent_section_elements - 1))),
                     docbook5_title, id2)
             print(output_text)
             return output_text