Missing values

[MPeli]

Hi, there is an original and modified table. I wonder why there are not values in the difference table in the first two cells of the second row? I tested it with a js library. Thank you.

Original

01	02	03	04	05	06
02	2	A	A	A	A
17	2	C	C	C	C

Modified

01	02	03	04	05	06
17	2	C	C	C	C
17	1	B	B	B	B

Difference

@@	01	02	03	04	05	06
---	02		A	A	A	A
	17		C	C	C	C
+++	17	1	B	B	B	B

test_data.js.txt