a perl question

[Ian Smith]

In freebsd-questions Digest, Vol 344, Issue 4, Message: 14
On Tue, 4 Jan 2011 23:24:01 -0700 Chad Perrin <perrin at apotheon.com> wrote:
 > On Tue, Jan 04, 2011 at 09:33:03AM -0800, Randal L. Schwartz wrote:
 > > >>>>> "Patrick" == Patrick Bihan-Faou <patrick.bihan-faou at teambox.fr> writes:
 > > 
 > > Patrick> cat asdf.txt | grep -v XYZ | grep -v bla
 > > 
 > > And yet, you still have the "Useless Use of Cat".
 > 
 > The weirdest thing about most useless uses of cat is that not using cat
 > would actually be a little clearer and involve fewer keystrokes -- as in
 > this case.

Do you know of any 'less useless' or more economical way to do such as:

 % cat /boot/boot1 /boot/boot2 | diff - /boot/boot
 %

?, Ian