If you’re a software developer, you’ve probably worked with diff files. Git diffs, Subversion diffs, CVS diffs.. Some kind of diff. You probably haven’t given it a second thought, really. You make some changes, run a command, a diff comes out. Maybe you hand it to someone, or apply it elsewhere, or put it up for review. Diff files show the differences between two text files, in the form of inserted (+) and deleted (-) lines. Along with this, they contain some basic information used to identify t...