* Details of changes are following url. https://github.com/rdoc/rdoc/blob/master/History.rdoc#510--2017-02-24 git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57703 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* bin/rdoc: ditto * test/rdoc: ditto * NEWS: Updated with RDoc 4.0 information git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37889 b2dd03c8-39d4-4d8f-98ff-823fe69b080e