old_contents: #!/usr/bin/env python
  
  '''
  Copyright (c) 2016 anti-XSS developers
  '''
  
  class CountPage(object):
  
      number = 0
  
      def __init__(self, number=0):
          self.number = number
  
      def setNumber(self, number):
          self.number = number
  
      def getNumber(self):
          return self.number
  
      def incNumber(self):
          self.number += 1
  
new_contents: #!/usr/bin/env python
  
  '''
  Copyright (c) 2016 anti-XSS developers
  '''
  
  class CountPage(object):
  
      number = 0
  
      def __init__(self, number=0):
          self.number = number
  
          pass
  
      def setNumber(self, number):
          self.number = number
  
          pass
  
      def getNumber(self):
          return self.number
  
      def incNumber(self):
          self.number += 1
  
          pass
  
      def toString(self):
          return 'number = ' + str(number)
  
subject: Add toString()