old_contents: '''
  Reverse a string
  
  '''
  
  def reverse_string_iterative(string):
  	pass
  
  def reverse_string_recursive(string):
  	pass
  
  def reverse_string_pythonic(string):
  	return string[::-1]
new_contents: '''
  Reverse a string
  
  '''
  
  def reverse_string_iterative(string):
  	result = ''
  	for char in range(len(string) - 1, -1 , -1):
  		result += char
  	return result
  
  def reverse_string_recursive(string):
  	if string:
          return reverse_string_recursive(string[1:]) + string[0]
      return ''
  
  def reverse_string_pythonic(string):
  	return string[::-1]
subject: Add iterative and recursive solutions to reverse strings