mention *args occurring with default parameters

Another one from the course Slack:

Comment/suggestion for "1.7. The pirate function definition" solution, referring back to the previous subsection where it mentions

# this will result in a SyntaxError
def make_it_bigger(a, b=100, c):

It could be emphasised, that this one

def give_rum(quantity=1, *what, to="all the crew!")

doesn't cause an exception since the "*what" is actually a reference and defaults to () if not provided.