Missing label for enforcing required rights in diff

Steps to reproduce:

1. Create a page with content

   {{velocity}}
   $doc.setEnforceRequiredRights(true)
   $doc.save()
   {{/velocity}}

2. View the diff between the last two versions.

Expected result:

A label like "Enforce Required Rights" is displayed with the difference below it.

Actual result:

core.viewers.diff.metadata.enforceRequiredRights is displayed.