Ln 3 88,8 means: "the original file, starting on line 88, had 8 lines before this diff was applied." Ln 3 88,6 means: "the modified/new file, starting on line 88, has 6 lines after this diff is applied."
> less 2 lines = 165-2 = 163 lines
Ln 9 -162,4 +160,13 indicates that the following information shows the original file, starting on line
162, had 4 lines of code, and the modified/new file, starting on line 160, has 13 lines of code
> more 9 lines (13-4=9) so 163 + 9 = 172