service/documentation.md

@@ -511,7 +511,8 @@ Staff hours, hosting costs shadowed by GitLab.
    with caching, generating a 500 page site takes 30 seconds, 2
    minutes without caching
  * [Sphinx](https://www.sphinx-doc.org/): used by [Read the docs](https://readthedocs.org/), enforces more structure
-   and more formal (if less familiar) markup (ReStructured Text, RST)
+   and more formal (if less familiar) markup (ReStructured Text, RST),
+   see also [rstfmt](https://github.com/dzhu/rstfmt) a linter/formatter for RST
  * [zola](https://www.getzola.org/): rust
 
 [Nanoc]: https://nanoc.ws/