[Port] fix printing of None rotation

masque/test/test_ports.py

@@ -46,6 +46,11 @@ def test_port_measure_travel() -> None:
     assert rotation == pi
 
 
+def test_port_describe_any_rotation() -> None:
+    p = Port((0, 0), None)
+    assert p.describe() == "pos=(0, 0), rot=any"
+
+
 def test_port_list_rename() -> None:
     class MyPorts(PortList):
         def __init__(self) -> None: