old_contents: import pytest
  
  from pyQuantuccia import quantuccia
  
  
  def test_function_fails_correctly_on_bad_input():
      """
      If we send in something which isn't three 
      appropriate ints, something reasonable should
      happen.
      """
      with pytest.raises(Exception):
          quantuccia.united_kingdom_is_business_day(1, 2, 3, 4)
  
new_contents: import pytest
  
  from pyQuantuccia import quantuccia
  
  
  def test_function_fails_correctly_on_bad_input():
      """
      If we send in something which isn't three
      appropriate ints, something reasonable should
      happen.
      """
      with pytest.raises(Exception):
          quantuccia.united_kingdom_is_business_day(1, 2, 3, 4)
  
subject: Remove trailing space.