[Maxful]

Thanks for the detailed explanations, masaegu san.

By the way, masaegu san, why did you use opt for "直します" instead of "直ります" for these sentences:

スミスさんはスペリングの間違いを直した。

悪い癖（くせ）は早く直しなさい。

Is it possible to replace "直します" with "直ります" for both the sentences above, and also, can I use "直ります" for fixing car, etc?

It is alittle bit complicated because I understand that there is another verb called "修理します" (repair).

Are there alot of differences between "直ります", "直します", "修理します"?

Usually I would use "直します" when referring to correcting something like computer (programming), etc. And "修理します" when referring to repairing a car, computer (system), etc.