test_rational.rb: r51828
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51829 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test_rational.rb: r51828
encoding of exception message.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51829 b2dd03c8-39d4-4d8f-98ff-823fe69b080e