docs/156724: [PATCH] Porter's Handbook uses shism $()

[ryusuke at FreeBSD.org]

Synopsis: [PATCH] Porter's Handbook uses shism $()

Responsible-Changed-From-To: freebsd-doc->ryusuke
Responsible-Changed-By: ryusuke
Responsible-Changed-When: Sun May 22 10:40:40 UTC 2011
Responsible-Changed-Why: 
I'll take this.

http://www.freebsd.org/cgi/query-pr.cgi?pr=156724