Make 2 blank lines between global definitions

iquip/apps/stage.py

@@ -41,6 +41,7 @@ def wrapped(self: "StageManager", key: str, *args, **kwargs):
             self._clients.pop(key)  # pylint: disable=protected-access
     return wrapped
 
+
 class StageManager(QObject):
     """Manages the stage RPC clients which live in a dedicated thread.