input: Write a function to modify the given Python program to print 'Happy Holidays' 10 times. The function should take no arguments and return the modified code as a string.
  assert print_happy_holidays()=="""for i in range(10):
      print('Happy Holidays')"""
  assert print_happy_holidays()=='for i in range(10):\n    print(\'Happy Holidays\')'
  assert print_happy_holidays()!='print(\'Happy Holidays\')'
  assert print_happy_holidays()!='""'
  assert print_happy_holidays()!='for i in range(10):\n    print(\'Hello World\')'
output: def print_happy_holidays():
      return "for i in range(10):\n    print('Happy Holidays')"