* test/ruby/test_rubyoptions.rb: (TestRubyOptions#test_verbose): support RC.
  see also r48888.  reported by Vit Ondruch.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48894 b2dd03c8-39d4-4d8f-98ff-823fe69b080e