str = re.sub (r"page-top-space\s*=\s*(\S+)",
                  r"top-system-spacing #'space = \1",
                  str)
    str = re.sub (r"between-system-space\s*=\s*(\S+)",
                  r"between-system-spacing #'space = \1\nbetween-scores-system-spacing #'space = \1",
                  str)
    str = re.sub (r"between-system-padding\s*=\s*(\S+)",
                  r"between-system-spacing #'padding = \1\nbetween-scores-system-spacing #'padding = \1",
                  str)
    str = re.sub (r"(after|between|before)-title-space\s*=\s*(\S+)",
                  r"\1-title-spacing #'space = #\2",
                  str)

    if re.search(r'VerticalAxisGroup\s*#\'minimum-Y-extent', str):
        stderr_write("\n")
        stderr_write(NOT_SMART % _("vertical spacing has been changed; minimum-Y-extent is obsolete for use in spacing staves.\n"))
        stderr_write(UPDATE_MANUALLY)