The document first appeared 2010-11-11. The latest change was on 2023-05-10. See https://www.fossil-scm.org/home/finfo/www/fossil-v-git.wiki for a complete change history for the document - including changes on branches.
Aside: How would you get this information (the complete change history in a single file of a larger project) if the repository was on GitHub?
Helpful hint: Click two nodes on the graph to see a diff between the two selected versions.