Update to RDoc 6.0.0 with Ruby 2.5.0-rc1 by koic · Pull Request #1700 · ruby/www.ruby-lang.org
RDoc seems to be updated to RDoc 6.0.0 with Ruby 2.5.0-rc1.
It is not RDoc 6.0.0.beta3.
Ruby 2.5.0-rc1
% ruby -rrdoc -ve 'p RDoc::VERSION'
ruby 2.5.0rc1 (2017-12-14 trunk 61243) [x86_64-dar...
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