test_exception.rb: get rid of did_you_mean
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52403 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test_exception.rb: get rid of did_you_mean
rid of failure caused by did_you_mean message.
[ruby-core:71282] [Bug #11640]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52403 b2dd03c8-39d4-4d8f-98ff-823fe69b080e