= 3 is not supported on Windows, so should not specify such options when calling spawn or others.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31016 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31016 b2dd03c8-39d4-4d8f-98ff-823fe69b080e