dump to stdout
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55391 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
dump to stdout
instead of a string, get rid of hung up.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55391 b2dd03c8-39d4-4d8f-98ff-823fe69b080e