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Changes between Version 1 and Version 2 of Ticket #33258

-              v1
+              v2
 In Django's Admin class, most "lists" are initialized as tuples `()` while two of them (`inlines` and `actions`)are initialized as lists `[]`
+`
+{{{
 list_display = ('__str__',)
 list_display_links = ()
 …
 ...
 actions = []
+`
+}}}
 This is inconsistent.
 And also there is a Since these are declared in the class, they are shared among all instances if this value is not set.
+And also since these are declared in the class, they are shared among all instances if this value is not set. This brings the problem where you inadvertedly add a value to a list and this gets added to all Admin instances where this attribute has not been set.
+I wanted to add an action to an admin subclass so I did `MyAdmin.actions.append('some_action')` which added this action to all my admins who had not set a new value to `actions`. While lists are more semantically correct than tuples, tuples have the advantage of being immutable, so they force users to reset the value every time.
+ie: I wanted to add an action to an admin subclass so I did `MyAdmin.actions.append('some_action')` which added this action to all my admins who had not set a new value to `actions`.
+While lists are more semantically correct than tuples, tuples have the advantage of being immutable, so they force users to reset the value every time.
 So, two solutions: