code: def format_author_ed(citation_elements):
      
      for el in citation_elements:
          if el['type'] == 'AUTH':
              el['auth_txt'] = el['auth_txt'].replace('(ed. )', '(ed.)')
              el['auth_txt'] = el['auth_txt'].replace('(eds. )', '(eds.)')
      return citation_elements
docs: Standardise to (ed.) and (eds.)
  
      e.g. Remove extra space in (ed. )