Function definition order is certainly meaningful, at least to a human reader. Suppose co-worker 1's function is related to func_before, and co-worker 2's func

Function definition order is certainly meaningful, at least to a human reader. Suppose co-worker 1's function is related to func_before, and co-worker 2's function is related to func_after, and the VCS flipped them around. Or alternatively, I go in by myself and re-arrange the order of functions in a file to improve the clustering. If the VCS thinks the order of functions is meaningless, it won't recognize the change.