Fix docs typo.

Author: HexDecimal

tcod/event.py

@@ -994,7 +994,7 @@ def __init__(self, type: str, which: int):
 
     @property
     def controller(self) -> tcod.sdl.joystick.GameController:
-        """The :any:`GameController: for this event."""
+        """The :any:`GameController` for this event."""
         if self.type == "CONTROLLERDEVICEADDED":
             return tcod.sdl.joystick.GameController._open(self.which)
         return tcod.sdl.joystick.GameController._from_instance_id(self.which)