docs: def _russianreporter_cable_ids():
      """\
      Returns a set of cable identifiers of cables published by Russian Reporter.
      See <http://aebr.home.xs4all.nl/wl/rusrep/>
      """
      s = urllib2.urlopen(_RR_IRI).read()
      return set(_WL_CABLE_ID_PATTERN.findall(s))