old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  """
  Unicode to ASCII Utility
  ========================
  """
  
  import sys
  if sys.version_info[0] <= 3:
      # Smelly hack for Python 2.x: https://stackoverflow.com/q/3828723/931625
      reload(sys)  # noqa
      sys.setdefaultencoding('utf-8')
  
  import codecs
  import os
  import unicodedata
  
  __copyright__ = 'Copyright (C) 2013-2018 - Colour Developers'
  __license__ = 'New BSD License - http://opensource.org/licenses/BSD-3-Clause'
  __maintainer__ = 'Colour Developers'
  __email__ = 'colour-science@googlegroups.com'
  __status__ = 'Production'
  
  __all__ = ['SUBSTITUTIONS', 'unicode_to_ascii']
  
  SUBSTITUTIONS = {
      '–': '-',
      '“': '"',
      '”': '"',
      '‘': "'",
      '’': "'",
  }
  
  
  def unicode_to_ascii(root_directory):
      """
      Recursively converts from unicode to ASCII *.py*, *.bib* and *.rst* files
      in given directory.
  
      Parameters
      ----------
      root_directory : unicode
          Directory to convert the files from unicode to ASCII.
      """
  
      for root, dirnames, filenames in os.walk(root_directory):
          for filename in filenames:
              if (not filename.endswith('.py') and
                      not filename.endswith('.bib') and
                      not filename.endswith('.rst') and
                      filename != 'unicode_to_ascii.py'):
                  continue
  
              filename = os.path.join(root, filename)
              with codecs.open(filename, encoding='utf8') as file_handle:
                  content = file_handle.read()
  
              with codecs.open(filename, 'w', encoding='utf8') as file_handle:
                  for key, value in SUBSTITUTIONS.items():
                      content = content.replace(key, value)
  
                  content = unicodedata.normalize('NFD', content).encode(
                      'ascii', 'ignore')
  
                  file_handle.write(content)
  
  
  if __name__ == '__main__':
      unicode_to_ascii(os.path.join('..', 'colour_demosaicing'))
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  """
  Unicode to ASCII Utility
  ========================
  """
  
  import sys
  if sys.version_info[0] < 3:
      # Smelly hack for Python 2.x: https://stackoverflow.com/q/3828723/931625
      reload(sys)  # noqa
      sys.setdefaultencoding('utf-8')
  
  import codecs
  import os
  import unicodedata
  
  __copyright__ = 'Copyright (C) 2013-2018 - Colour Developers'
  __license__ = 'New BSD License - http://opensource.org/licenses/BSD-3-Clause'
  __maintainer__ = 'Colour Developers'
  __email__ = 'colour-science@googlegroups.com'
  __status__ = 'Production'
  
  __all__ = ['SUBSTITUTIONS', 'unicode_to_ascii']
  
  SUBSTITUTIONS = {
      '–': '-',
      '“': '"',
      '”': '"',
      '‘': "'",
      '’': "'",
  }
  
  
  def unicode_to_ascii(root_directory):
      """
      Recursively converts from unicode to ASCII *.py*, *.bib* and *.rst* files
      in given directory.
  
      Parameters
      ----------
      root_directory : unicode
          Directory to convert the files from unicode to ASCII.
      """
  
      for root, dirnames, filenames in os.walk(root_directory):
          for filename in filenames:
              if (not filename.endswith('.py') and
                      not filename.endswith('.bib') and
                      not filename.endswith('.rst') and
                      filename != 'unicode_to_ascii.py'):
                  continue
  
              filename = os.path.join(root, filename)
              with codecs.open(filename, encoding='utf8') as file_handle:
                  content = file_handle.read()
  
              with codecs.open(filename, 'w', encoding='utf8') as file_handle:
                  for key, value in SUBSTITUTIONS.items():
                      content = content.replace(key, value)
  
                  content = unicodedata.normalize('NFD', content).encode(
                      'ascii', 'ignore')
  
                  file_handle.write(content)
  
  
  if __name__ == '__main__':
      unicode_to_ascii(os.path.join('..', 'colour_demosaicing'))
  
subject: Fix incorrect interpreter detection in "unicode_to_ascii" utility module.