add WIN32OLE_VARIABLE#to_s method. add WIN32OLE_METHOD#to_s method. add WIN32OLE_PARAM#to_s method. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3813 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2508 b2dd03c8-39d4-4d8f-98ff-823fe69b080e