toCharArray() reference description should mention that \0 is added to the end

It would be helpful if the description mentioned that \0 is added to the end of the buffer.

It might be better for people unfamiliar with char arrays. I can raise an issue for you.

If you do not need a copy of the data, just use string.c_str(). It will save a lot of overhead.

char *ptr = string.c_str();