same bro, same

this is my only test case which is falling again and again

Because of the minor words. Read the instructions again:

Write a function that will convert a string into title case, given an optional list of exceptions (minor words). The list of minor words will be given as a string with each word separated by a space. Your function should ignore the case of the minor words string -- it should behave in the same way even if the case of the minor word string is changed.

I have tried removing spaces, line breaks "/n" but I can't solve it.

Maybe that's your problem. Instructions do not suggest that you should do this. They do however say what should be done for these characters.

I don't understand, how can I solve this?