* test/ruby/test_rubyoptions.rb (TestRubyOptions#test_notfound): after
  r41710, the path of command uses backslash as the separator on
  Windows.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41791 b2dd03c8-39d4-4d8f-98ff-823fe69b080e