TOC line number and title are missing / separated

[petermr]

In source-ordered lists the number and list title were separated

/structure/docling/examples/html/iari_2024.html
has missing number and then content at

Physics</th><td>89</td></tr><tr><th>6.5</th><th>National Phytotron Facility</th><td>90</td></tr><tr><td></td><th>Vegetable Science</th><td>90</td></tr><tr><th>6.6</th><td></td><td></td></tr><tr><th>7.</th><th>Social Scien ces and Technology 

Note list item "Vegetable Science" is missing the number and
its number is in the following line 6.6 with no title