app/overrides/roles/_form.rb
Deface::Override.new(
virtual_path: 'roles/_form',
name: 'remove_non_members_issues_visibility',
surround: "erb[silent]:contains('unless @role.anonymous?')",
closing_selector: "erb[silent]:contains('end')",
text: '<% unless @role.non_member_watcher? || @role.non_member_author? %><%= render_original %><% end %>')