class RDoc::RI::Driver

def add_extension_modules(out, type, extensions)
  return if extensions.empty?
  out << RDoc::Markup::Rule.new(1)
  out << RDoc::Markup::Heading.new(1, "#{type}:")
  extensions.each do |modules, store|
    if modules.length == 1 then
      add_extension_modules_single out, store, modules.first
    else
      add_extension_modules_multiple out, store, modules
    end
  end
end