Listener: fix doc markup, include in globals of its module

Author: jepler

shared-bindings/_canio/Listener.c

@@ -32,10 +32,10 @@
 #include "py/objproperty.h"
 
 //| class Listener:
-//| """Listens for CAN message
+//|     """Listens for CAN message
 //|
-//| _canio.Listener is not constructed directly, but instead by calling the
-//| Listen method of a _canio.CAN object."""
+//|     _canio.Listener is not constructed directly, but instead by calling the
+//|     Listen method of a _canio.CAN object."""
 //|
 
 //|     def read(self) -> Optional[Message]:

shared-bindings/_canio/__init__.c

@@ -57,11 +57,9 @@
 STATIC const mp_rom_map_elem_t canio_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR__canio) },
     { MP_ROM_QSTR(MP_QSTR_CAN), MP_ROM_PTR(&canio_can_type) },
+    { MP_ROM_QSTR(MP_QSTR_Listener), MP_ROM_PTR(&canio_listener_type) },
     { MP_ROM_QSTR(MP_QSTR_Match), MP_ROM_PTR(&canio_match_type) },
     { MP_ROM_QSTR(MP_QSTR_Message), MP_ROM_PTR(&canio_message_type) },
-#if 0
-    { MP_ROM_QSTR(MP_QSTR_Listener), MP_ROM_PTR(&canio_listener_type) },
-#endif
 };