Improve test runner

nucleus/src/tests.rs

@@ -12,6 +12,7 @@ pub fn test_runner(tests: &[&dyn Fn()]) {
     println!("Running {} tests", tests.len());
     for test in tests {
         test();
+        println!("[ok]");
     }
     println!("[success]");
     qemu::semihosting::exit_success();