removes all lines consisting only of spaces

this really bothers me for some reason - nothing technical

InvenTree/plugins/action/action.py

@@ -23,10 +23,10 @@ class ActionPlugin(plugin.InvenTreePlugin):
         look at the PLUGIN_NAME instead.
         """
         action = cls.ACTION_NAME
-        
+
         if not action:
             action = cls.PLUGIN_NAME
-        
+
         return action
 
     def __init__(self, user, data=None):