message: Explain `tests::init` function
diff: @@ -329,8 +329,8 @@ fn main() {
  }
  }
  -static INIT: std::sync::Once = std::sync::Once::new();
  -
  +/// Call this from every test to initialize eyre only once across all tests.
  pub fn init() {
  + static INIT: std::sync::Once = std::sync::Once::new();
  INIT.call_once(|| color_eyre::install().unwrap());
  }
  