please help

[Dadadayuer]

i think it does not work well. i use two file, one content is "hi123456" ,and another is "hi123456 i am your firend". and it can't find the difference.
the return is :
Difference between:
a/ test1.txt
b/ test2.txt

Process finished with exit code 0

[DHDaniel]

hmm, looks like you found an edge case @Dadadayuer (file with only 1 line). I'll take a look at it later, or if you want you can submit a PR and I'll merge it in :)