[PLUG] the opposite of diff

[Art Alexion <art.alexion@verizon.net>]

I have two emails that are causing the same strange behavior and I want 
to find out why.  I know I can use diff to find out how two files 
differ.  Is there a corollary command that will show me what the files 
have in common?

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_______________________________________
Art Alexion
Arthur S. Alexion LLC
arthur [at] alexion [dot] com
aim: aalexion
sms: 2679725536 [at] messaging [dot] sprintpcs [dot] com

PGP fingerprint: 52A4 B10C AA73 096F A661  92D2 3B65 8EAC ACC5 BA7A
The attachment -- signature.asc -- is my electronic signature; no need for alarm.
Info @ http://mysite.verizon.net/art.alexion/encryption/signature.asc.what.html

Key for signed PDFs available at
http://mysite.verizon.net/art.alexion/encryption/ArthurSAlexion.p7c
The validation string is TTJY-ZILJ-BJJG.
________________________________________

Attachment: signature.asc
Description: OpenPGP digital signature