old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  # The MIT License (MIT)
  #
  # Copyright (c) 2013 ton1517 <tonton1517@gmail.com>
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy of
  # this software and associated documentation files (the "Software"), to deal in
  # the Software without restriction, including without limitation the rights to
  # use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
  # the Software, and to permit persons to whom the Software is furnished to do so,
  # subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in all
  # copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
  # FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
  # COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  # IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  #=======================================
  # config
  #=======================================
  
  NAME = 'randfilter'
  VERSION = '0.0.1'
  LICENSE = 'MIT License'
  DESCRIPTION = ''
  URL = 'https://github.com/ton1517/randfilter'
  AUTHOR = 'ton1517'
  AUTHOR_EMAIL = 'tonton1517@gmail.com'
  
  #=======================================
  # main
  #=======================================
  
  def main():
      pass
  
  if __name__ == "__main__":
      main()
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  # The MIT License (MIT)
  #
  # Copyright (c) 2013 ton1517 <tonton1517@gmail.com>
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy of
  # this software and associated documentation files (the "Software"), to deal in
  # the Software without restriction, including without limitation the rights to
  # use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
  # the Software, and to permit persons to whom the Software is furnished to do so,
  # subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in all
  # copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
  # FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
  # COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  # IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  """
  randfilter
  
  Usage:
      randfilter [-n <num> | -p <probability>] [-u | --unorder] [<file>...]
      randfilter -h | --help
      randfilter -v | --version
  
  Options:
      -n <num>            The choise number of lines.
      -p <probability>    The choise probability of lines. The value is 0.0 to 1.0.
      -u --unorder        Output lines are unordered.
      -h --help           Show this screen.
      -v --version        Show version.
  """
  
  from docopt import docopt
  
  #=======================================
  # config
  #=======================================
  
  NAME = 'randfilter'
  VERSION = '0.0.1'
  LICENSE = 'MIT License'
  DESCRIPTION = ''
  URL = 'https://github.com/ton1517/randfilter'
  AUTHOR = 'ton1517'
  AUTHOR_EMAIL = 'tonton1517@gmail.com'
  
  #=======================================
  # main
  #=======================================
  
  def main():
      pass
  
  if __name__ == "__main__":
      main()
  
subject: add docopt document.