input: Write a function to remove all whitespace from each string in a given list of strings. Return a new list with the modified strings. If the input list is empty, return an empty list.
  
  def remove_whitespace(word_list):
      return [word.replace(" ", "") for word in word_list]
  
  assert remove_whitespace(['Hello  World  ', 'Hi  there', 'Good  Morning']) == ['HelloWorld', 'Hithere', 'GoodMorning']
  assert remove_whitespace([]) == []
  assert remove_whitespace(['']) == ['']
  assert remove_whitespace(['NoSpace']) == ['NoSpace']
  assert remove_whitespace(['One   Space']) == ['OneSpace']
output: def remove_whitespace(word_list):
      return [word.replace(" ", "") for word in word_list]