It does.

Same problem

either wrong report or fixed by someone

• The first ';' of the for is empty because my loop variables a and b were already initialised outside the loop, and the last ; on that line is the empty for statement block because there is nothing to do - i.e the purpose of the loop is to side-effect the a and b until they cross.

• a and b values represent how much space padded is needed for the strings. The " ".repeat(...) simply adds the appropriate number of spaces.

To understand it, you should just temporarily fork my solution so you can print out the values to see what is hapenning.