Can you give an example of what you mean? I'm not sure I understand the question. If you are talking about the spacing between words/letters then it's probably just because it's hard to tell how many spaces the "Practice-IT" questions are asking for. If so, just look more closely at the prompt and error message and it should help.
However, if it's about the spacing between lines, I'm not sure what question you are asking.
Hope this helps.