Editing filter 602 (see also a graph of recent actions)
Description:
page_namespace == 3 & "confirmed" in user_groups & !( "bot" in user_groups ) & /** do not warn for subpages **/ !( "/" in page_title ) & ( comment := "-- derived from template:(?:ds|contentious topics)/alert(?:/first)?(?:/DS)? --"; /** cancels out most edits **/ added_lines irlike (comment + "|subst:") & /** now check added_lines_pst, which is the more expensive operation **/ added_lines_pst irlike comment & !( removed_lines irlike comment ) )