old_contents: # encoding=UTF-8
  
  # Copyright © 2014-2016 Jakub Wilk <jwilk@jwilk.net>
  #
  # 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.
  
  class Tag(object):
  
      def __init__(self, path, lineno, *args):
          if isinstance(path, str):
              self.path = path
          else:
              msg = 'path must be a string, not {0!r} object'.format(type(path).__name__)
              raise TypeError(msg)
          if isinstance(lineno, int) or lineno is None:
              self.lineno = lineno
          else:
              msg = 'lineno must be an int or None, not {0!r} object'.format(type(path).__name__)
              raise TypeError(msg)
          self.name = args[0]
          self.private = self.name[0] == '*'
          self.args = args
  
      def __str__(self):
          if self.lineno is None:
              location = self.path
          else:
              location = '{path}:{n}'.format(path=self.path, n=self.lineno)
          message = ' '.join(str(arg) for arg in self.args)
          return '{loc}: {msg}'.format(loc=location, msg=message)
  
  __all__ = ['Tag']
  
  # vim:ts=4 sts=4 sw=4 et
  
new_contents: # encoding=UTF-8
  
  # Copyright © 2014-2016 Jakub Wilk <jwilk@jwilk.net>
  #
  # 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.
  
  '''
  pydiatra tags
  '''
  
  class Tag(object):
  
      def __init__(self, path, lineno, *args):
          if isinstance(path, str):
              self.path = path
          else:
              msg = 'path must be a string, not {0!r} object'.format(type(path).__name__)
              raise TypeError(msg)
          if isinstance(lineno, int) or lineno is None:
              self.lineno = lineno
          else:
              msg = 'lineno must be an int or None, not {0!r} object'.format(type(path).__name__)
              raise TypeError(msg)
          self.name = args[0]
          self.private = self.name[0] == '*'
          self.args = args
  
      def __str__(self):
          if self.lineno is None:
              location = self.path
          else:
              location = '{path}:{n}'.format(path=self.path, n=self.lineno)
          message = ' '.join(str(arg) for arg in self.args)
          return '{loc}: {msg}'.format(loc=location, msg=message)
  
  __all__ = ['Tag']
  
  # vim:ts=4 sts=4 sw=4 et
  
subject: add docstring.