test_printf.rb: need to be infected
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36712 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test_printf.rb: need to be infected
plain object so that the results of to_s and inspect are infected.
[ruby-dev:46053] [Bug #6881]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36712 b2dd03c8-39d4-4d8f-98ff-823fe69b080e