ports/158827: devel/rubygem-rdoc: fix compatibility with ruby 1.8

[edwin at FreeBSD.org]

Synopsis: devel/rubygem-rdoc: fix compatibility with ruby 1.8

Responsible-Changed-From-To: freebsd-ports-bugs->ruby
Responsible-Changed-By: edwin
Responsible-Changed-When: Tue Jul 12 10:30:26 UTC 2011
Responsible-Changed-Why: 
Over to maintainer (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=158827