People rolling their own formats isn't really that uncommon. And besides, that file is one s/ =/:/g away from being valid YAML. There might even be a YAML or TOML parser around that will accept this, idk

there's an incredibly nasty set of regex and parsing that you could do to make this actually work

It only really looks nasty cuz I wanted to "parse" this file mentioning regex with regex for fun lol, it's basically YAML

The syntax of that file isn't the sus part imo. I feel like I'm being an annoying pedant but yeah