old_contents: 
  class LParen(object):
      pass
  
  
  class RParen(object):
      pass
  
  
  class Token(object):
      def __init__(self, text):
          self.text = text
  
      def startswith(self, x):
          return self.text.startswith(x)
  
      def replace(self, x, y):
          return self.text.replace(x, y)
  
      def __str__(self):
          return self.text.replace(" ", "\ ")
  
      def __repr__(self):
          return str(self)
  
  
  class Word(Token):
      pass
  
  
  class DoubleQuote(Token):
      def __str__(self):
          return '"%s"' % self.text
  
new_contents: 
  class LParen(object):
      pass
  
  
  class RParen(object):
      pass
  
  
  class Token(object):
      def __init__(self, text):
          self.text = text
  
      def startswith(self, x):
          return self.text.startswith(x)
  
      def replace(self, x, y):
          return self.text.replace(x, y)
  
      def __getitem__(self, x):
          return self.text[x]
  
      def __str__(self):
          return self.text.replace(" ", "\ ")
  
      def __repr__(self):
          return str(self)
  
  
  class Word(Token):
      pass
  
  
  class DoubleQuote(Token):
      def __str__(self):
          return '"%s"' % self.text
  
subject: fix environmental variables