letter-spacing as percentages

Test passes if the pattern is identical on all four lines.

ABC123().*$いろはx x x፡x་x ABC123().*$いろはx x x፡x་x

ABC123().*$いろはx x x፡x་x ABC123().*$いろはx x x፡x་x

ABC123().*$いろはx x x፡x་x ABC123().*$いろはx x x፡x་x

ABC123().*$いろはx x x፡x་x ABC123().*$いろはx x x፡x་x