input: Write a python function to sort a list of fruits in reverse alphabetical order.
  assert sort_fruits_reverse(['apple', 'banana', 'cherry'])==['cherry', 'banana', 'apple']
  assert sort_fruits_reverse(['mango', 'apple', 'banana', 'cherry'])==['mango', 'cherry', 'banana', 'apple']
  assert sort_fruits_reverse(['kiwi', 'orange', 'grape'])==['orange', 'kiwi', 'grape']
output: def sort_fruits_reverse(fruits):
      return sorted(fruits, reverse=True)