input: 
  from typing import List
  
  def change_greeting(original_greetings: List[str]) -> List[str]:
      """Change all elements in the given list from 'Hello World' to 'Happy Holidays'.
      >>> change_greeting(['Hello World', 'Hello World', 'Hello World'])
      ['Happy Holidays', 'Happy Holidays', 'Happy Holidays']
      >>> change_greeting(['Hello World', 'Hello World'])
      ['Happy Holidays', 'Happy Holidays']
      """
      return ['Happy Holidays' for _ in original_greetings]
  
output:     return ['Happy Holidays' if greeting == 'Hello World' else greeting for greeting in original_greetings]