Apply suggestion to test/test_coder.py

test/test_coder.py

@@ -17,7 +17,7 @@ class CoderTest(unittest.TestCase):
         self.assertRegex(code, "[A-Z]{3}")
 
     def test_get_code_digits(self):
-        """Test code is only digits and correct lenght."""
+        """Test code is only digits and correct length."""
         code = coder.get_code(3, "digits")
         self.assertRegex(code, "[0-9]{3}")