Lines of code changed is confounded by syntactic properties of the languages: For instance, languages that make a lot of use of indentation, like Lisp, will hav

Lines of code changed is confounded by syntactic properties of the languages: For instance, languages that make a lot of use of indentation, like Lisp, will have more changed lines of code but that doesn't necessarily reflect more activity. In Lisp, you often have huge diffs even for minor changes because these minor changes can lead to a change in indentation of many otherwise unaffected lines of code.