gem server: How to update gems with missing rdoc?

I really like gem server command which bootstraps the webserver with local RubyGems Documentation Index.

The only problem I have: some gems don't have rdoc files.

How can I add missing rdoc(all gems are mainstream gems, not my own)?

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Installed via Bundler;开发者_JAVA技巧 Rails 2.3.5

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You can generate all rdoc of all of your gem with command :

gem rdoc --all