def join_or_single(start, end):
if start == end:<EOL><INDENT>return start<EOL><DEDENT>else:<EOL><INDENT>return "<STR_LIT>".format(<EOL>start,<EOL>end<EOL>)<EOL><DEDENT>
Join passages range. If they are the same, return a single part of the range

    :param start: Start of the passage range
    :param end: End of the passage range
    :return: Finale Passage Chunk Identifier