torvalds@ppc970:~/v2.6/linux> git-diff-index HEAD
*100644->100664 blob 7476bb......->000000...... kernel/sched.c
-ie it shows that the tree has changed, and that `kernel/sched.c` has is
+i.e., it shows that the tree has changed, and that `kernel/sched.c` has is
not up-to-date and may contain new stuff. The all-zero sha1 means that to
get the real diff, you need to look at the object in the working directory
directly rather than do an object-to-object diff.