Fix a typo.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47687 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-09-23

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47688 b2dd03c8-39d4-4d8f-98ff-823fe69b080e