Duplicity from the 20190717 release of Tumbleweed (duplicity-0.8.01-1.1.x86_64)
fails when the --exclude-older-than option is used with a fully-specified date
in ISO format.  See below.  This didn't happen with the version of duplicity
from the 20190704 release.


> duplicity --exclude-older-than 2019-03-17T19:50:06-07:00 / ~/NoBackup/DuplicityTest

Traceback (innermost last):
  File "/usr/bin/duplicity", line 1711, in <module>
    with_tempdir(main)
  File "/usr/bin/duplicity", line 1697, in with_tempdir
    fn()
  File "/usr/bin/duplicity", line 1530, in main
    action = commandline.ProcessCommandLine(sys.argv[1:])
  File "/usr/lib64/python3.7/site-packages/duplicity/commandline.py", line
1153, in ProcessCommandLine
    args = parse_cmdline_options(cmdline_list)
  File "/usr/lib64/python3.7/site-packages/duplicity/commandline.py", line 683,
in parse_cmdline_options
    (options, args) = parser.parse_args(arglist)
  File "/usr/lib64/python3.7/optparse.py", line 1387, in parse_args
    stop = self._process_args(largs, rargs, values)
  File "/usr/lib64/python3.7/optparse.py", line 1427, in _process_args
    self._process_long_opt(rargs, values)
  File "/usr/lib64/python3.7/optparse.py", line 1501, in _process_long_opt
    option.process(opt, value, values, self)
  File "/usr/lib64/python3.7/optparse.py", line 785, in process
    self.action, self.dest, opt, value, values, parser)
  File "/usr/lib64/python3.7/site-packages/duplicity/commandline.py", line 203,
in take_action
    self, action, dest, opt, value, values, parser)
  File "/usr/lib64/python3.7/optparse.py", line 805, in take_action
    self.callback(self, opt, value, parser, *args, **kwargs)
  File "/usr/lib64/python3.7/site-packages/duplicity/commandline.py", line 261,
in add_selection
    select_opts.append((util.fsdecode(option), util.fsdecode(additional_arg)))
  File "/usr/lib64/python3.7/os.py", line 821, in fsdecode
    filename = fspath(filename)  # Does type-checking of `filename`.
 TypeError: expected str, bytes or os.PathLike object, not int