This changes the behavior of the very useful . command to leave the cursor at the point where it was before editing started. This means that if I have, say, a list of files from a change summary that look like this: .../foo/bar/pick.c .../cram/bar/yup.c .../drop/bar/slop.c And I want to change the leading path, I can go to the first one, and type (say) c3t/anotherdir This gives me: anotherdir/pick.c .../cram/bar/yup.c .../drop/bar/slop.c help .].