docs/185632: Handbook typo

[remko at FreeBSD.org]

Synopsis: Handbook typo

Responsible-Changed-From-To: freebsd-doc->remko
Responsible-Changed-By: remko
Responsible-Changed-When: Fri Jan 10 08:46:20 UTC 2014
Responsible-Changed-Why: 
Take this PR

http://www.freebsd.org/cgi/query-pr.cgi?pr=185632