* lib/rdoc: Update to RDoc 3.9. Fixed ri [], stopdoc creating an

object reference, nodoc for class aliases, verbatim === lines.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32767 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rdoc/parser/ruby_tools.rb

@@ -153,6 +153,8 @@ module RDoc::Parser::RubyTools
     @token_listeners.each do |obj|
       obj.pop_token
     end if @token_listeners
+
+    nil
   end
 
 end