Tests passing when they shouldn't - Claryfying code using variables (Lesson 12)

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Describe the bug
in the section where you need to declare variable for angular_speed. If delta is removed from the rotate function rotate(angular_speed * delta), the tests still pass, yet the the result is messy

To Reproduce
Steps to reproduce the bug:

1. Go to rotate function

2. delete delta parameter from it

Expected behavior
Tests would fail.

Information about your device (please complete the following information):
Windows 11 PRO
Firefox 125.0.3 (64bit)