bug#24142: comm

[Jan 'oglop' Gazda]

Hello, comm gives me strange results, could you please tell me what I do
wrong or is it a bug?
The idea: is to compare 2 files where result is unique lines in second file
command used:
comm -13 original restored

expected result:
./backup_home_saptech.txt

result I got:
was content of second file.

diff check https://www.diffchecker.com/puy0ycek - 1 addition in second file

Thanks
Gazda Jan

original
Description: Binary data

restored
Description: Binary data