old_contents: # Implement fibonacci sequence function using recursion
  
  def get_fib(position):
  	if position < 2: # base case
  		return position
  	else:
  		return get_fib(position-1) + get_fib(position-2) # add two previous numbers
  
new_contents: # Implement fibonacci sequence function using recursion
  
  def get_fib(position):
  	if position < 2: # base case
  		return position
  	else:
  		return get_fib(position-1) + get_fib(position-2) # add two previous numbers
  
  
  # test cases
  print get_fib(9) # returns 34
  print get_fib(11) # returns 89
  print get_fib(0) # returns 0
  
subject: Add test cases