fix typo by @zsalzbank [fix GH-289]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40327 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-04-17

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40328 b2dd03c8-39d4-4d8f-98ff-823fe69b080e