width of DESCR?

[Markus Bergkvist]

Hi

What should the width of DESCR be? "OpenBSD Porting Checklist"[1] says 
'fmt -w 72' and "Port Testing Guide"[2] says 70 characters.

[1] http://www.openbsd.org/checklist.html
[2] http://www.openbsd.org/porttest.html

/Markus