title: Error installing rails-4.0.0
body: <p>Using <code>OS X 10.8.4</code> and <code>ruby 1.9.3p194</code></p>
  
  <pre><code>$ gem install rails
  Successfully installed rails-4.0.0
  1 gem installed
  Installing ri documentation for rails-4.0.0...
  Installing RDoc documentation for rails-4.0.0...
  ERROR:  While generating documentation for rails-4.0.0
  ... MESSAGE:   error generating /Users/michaelirey/.rvm/gems/ruby-1.9.3-p194/doc/rails-4.0.0/rdoc/guides/Rakefile.html: Error while evaluating /Users/michaelirey/.rvm/gems/ruby-1.9.3-p194/gems/rdoc-3.12.2/lib/rdoc/generator/template/darkfish/page.rhtml: undefined method `chomp' for nil:NilClass (RDoc::Error)
  ... RDOC args: --op /Users/michaelirey/.rvm/gems/ruby-1.9.3-p194/doc/rails-4.0.0/rdoc lib --title rails-4.0.0 Documentation --quiet
  </code></pre>
  
  <p>Looks like this is just for the documentation, but it would still be nice to get things installed without error.</p>