I've only looked at the first project in test-plan/rust, but it clearly contradicts the description in project.md. It should be virtually empty, with only tests

I've only looked at the first project in test-plan/rust, but it clearly contradicts the description in project.md. It should be virtually empty, with only tests and the student is supposed to write all the code needed for the tests to pass. But it actually contains all the needed code, it compiles and all tests are green. I don't quite get it, what's the "learning" part? Just looking at the code and trying to understand it?