I was talking to one of my colleague and the reason why we need to set minor_words = '' is because if minor_words doesn't get passed through when the function was called we set the default value of minor_words to an empty string.

Feel free to correct me if what I said is wrong.

can someone please explain to me why we needed minor_words = ''
instead of just leaving it as minor words
I understand that because you added the = '' the solution worked, because i actually got an error without it