Submitting a Port Upgrade

[Doug Hardie]

I am totally confused.  The Porter's Handbook in section 3.6 says:

"Next, simply include the output of shar `find port_dir` in a bug  
report and send it with the send-pr(1) program "

Ok.  I did that with an upgrade for qpopper.  I got back the  
following response:

"Please submit updates in "unified diff" format!
You'll find instructions in the Porters Handbook. Then please submit  
a followup to this PR."

Huh?  What do you want?  I find no examples of unified diff format in  
the Handbook.