Visual page diff tool: Only display that part of a diff that actually has changes

Currently when you're viewing the differences between two revisions of a page, you see the whole page in the diff output, even if there for example was only one small change at the bottom. (the same is true for automatically generated notification emails)

It would be nice if Confluence could output only the changed lines in context of a few unchanged lines, like e.g. the Unix diff tool does. The diff is nice, but if you have to scroll down the whole page to see what actually was changed it sort of loses a lot of it's usefulness. The notification emails would also be much easier to read.