Derrick Moser - 2014-12-24

The file on the left has Unix line endings (ie. "\n") while the file on the right has DOS line endings (ie. "\r\n"). The differences are in non-displayed white space characters that is why you don't see any characters with dark pink backgrounds. You can see these difference if you enable "Show white space characters" in the Display preferences. If you want to ignore these differences, you can enable "Ignore end of line differences" in the Display preferences.