old_contents: # -*- coding: utf8 -*-
  # flake8: NOQA
  import sys
  
  PY2 = sys.version_info[0] == 2
  
  if PY2:
      unichr = unichr
      text_type = unicode
      string_types = (str, unicode)
      integer_types = (int, long)
      import collections as collections_abc
      from urllib import urlretrieve
  
      import cPickle as pickle
      import urlparse
      from cStringIO import StringIO as BytesIO
      from StringIO import StringIO
  
      def console_to_str(s):
          return s.decode('utf_8')
  
      exec('def reraise(tp, value, tb=None):\n raise tp, value, tb')
  
  else:
      unichr = chr
      text_type = str
      string_types = (str,)
      integer_types = (int,)
  
      import collections.abc as collections_abc
      import urllib.parse as urllib
      import urllib.parse as urlparse
      from io import BytesIO, StringIO
      from urllib.request import urlretrieve
  
      console_encoding = sys.__stdout__.encoding
  
      def console_to_str(s):
          """ From pypa/pip project, pip.backwardwardcompat. License MIT. """
          try:
              return s.decode(console_encoding)
          except UnicodeDecodeError:
              return s.decode('utf_8')
  
      def reraise(tp, value, tb=None):
          if value.__traceback__ is not tb:
              raise (value.with_traceback(tb))
          raise value
  
new_contents: # -*- coding: utf8 -*-
  # flake8: NOQA
  import sys
  
  PY2 = sys.version_info[0] == 2
  
  if PY2:
      unichr = unichr
      text_type = unicode
      string_types = (str, unicode)
      integer_types = (int, long)
      import collections as collections_abc
      from urllib import urlretrieve
  
      import cPickle as pickle
      import urlparse
      from cStringIO import StringIO as BytesIO
      from StringIO import StringIO
  
      def console_to_str(s):
          return s.decode('utf_8')
  
      exec('def reraise(tp, value, tb=None):\n raise tp, value, tb')
  
  else:
      unichr = chr
      text_type = str
      string_types = (str,)
      integer_types = (int,)
  
      import collections.abc as collections_abc
      import urllib.parse as urllib
      import urllib.parse as urlparse
      from io import BytesIO, StringIO
      from urllib.request import urlretrieve
  
      console_encoding = sys.__stdout__.encoding
  
      def console_to_str(s):
          """From pypa/pip project, pip.backwardwardcompat. License MIT."""
          try:
              return s.decode(console_encoding)
          except UnicodeDecodeError:
              return s.decode('utf_8')
  
      def reraise(tp, value, tb=None):
          if value.__traceback__ is not tb:
              raise (value.with_traceback(tb))
          raise value
  
subject: Format with black 21.6b0