docs: def task2ics():
      """Command line tool to convert from Taskwarrior to iCalendar"""
      from argparse import ArgumentParser, FileType
      from sys import stdout
  
      parser = ArgumentParser(description='Converter from Taskwarrior to iCalendar syntax.')
      parser.add_argument('indir', nargs='?', help='Input Taskwarrior directory (default to ~/.task)', default=expanduser('~/.task'))
      parser.add_argument('outfile', nargs='?', type=FileType('w'), default=stdout,
                          help='Output iCalendar file (default: stdout)')
      args = parser.parse_args()
  
      task = IcsTask(args.indir)
      args.outfile.write(task.to_vobject().serialize())