This is great. Good to see standardized testing improvements to the pg_regress add-on. YAML does better than JSON when it comes to readability. To an extent, TOML as well.

I couldn't disagree more about YAML. Semantic whitespace is unreadable, as are all the optional language elements. I've been using YAML for years and still can't read it quickly. I find myself asking, "Wait is that a string or boolean? Is it an object or siblings in an array?"

JSON is unambiguous and whitespace agnostic. There's only one way to do things. It's far more readable.

It's readable, it just desperately needs type safety: https://github.com/crdoconnor/strictyaml

When I read "gbq enabled: yes" I don't worry about whether it's a string or a boolean when reading it, I worry about whether it's a string or a boolean when I want to change it and it gets parsed again.