docs: def found_duplicates(counts):
      """Log that duplicates were found.
  
      :param counts: A list of duplicate marker names along with their number
                     of occurences.
      :type counts: list
  
      """
      _logger.warning("Duplicated markers found")
      for marker, count in counts:
          _logger.warning(" - {}: {:,d} times".format(marker, count))
      _logger.warning("Appending ':dupX' to the duplicated markers according "
                      "to their location in the file.")