Add in a description of hardcoded variables you can use in queries, seems pretty relevant for bullet journal style scripting of tasks.
Since this is copied from core/templates, and likely to change(?) maybe it would be best to use an #include directive and break out into a separate file?
From the changelog it seems like this setting was added in 0.0.31 but doesn't appear to be documented anywhere.
Thanks for this project! Let me know if you have any feedback, and/or if you'd like me to keep submitting PRs like these when I find them.