Steps to recreate issues:

1. Run ./runme.sh
   • Note that this script uses python3 to create a virtual environment (3.5+ is required)
2. Access the admin interface from your browser on http://localhost:8000/admin
3. Login as a super user (username: test, password: pass)
4. Navigate to the Bar admin changelist page (http://localhost:8000/admin/app/bar/). Note that BarAdmin IS NOT a subclass of VersionAdmin.
5. Change thing for one record and stuff for the other and click Save.
6. Observe that in the history page for the record that had thing changed, the action is listed as "Changed thing". Also observe that in the history for the record that had stuff changed, the action is listed as "Changed stuff".
7. Navigate to the Foo admin changelist page (http://localhost:8000/admin/app/bar/). Note that FooAdmin IS a subclass of VersionAdmin.
8. Repeat step 5, this time for the Foo records.
9. (ISSUE #1) Observe that in the history pages for both records, the action is the same.
10. From the Foo admin changelist page, make another set of changes that affects both records.
11. From the history page of any one Foo record, revert to the previous set of changes (i.e. the version directly after the initial version).
12. (ISSUE #2) From the changelist page, observe that both records have been reverted.
13. (ISSUE #3) Observe that only one history page has been updated in spite of both records being affected.

Issues 2 and 3 may be resolved by updating the history of all records that are part of a revision or by ensuring that only one record is reverted.

Note: reverting to the initial version will affect a single record.