class RuboCop::Cop::GitHub::RailsControllerRenderActionSymbol

def on_send(node)
  if sym_node = render_sym?(node)
    add_offense(sym_node) do |corrector|
      register_offense(sym_node, node)
    end
  elsif option_pairs = render_with_options?(node)
    option_pairs.each do |pair|
      if sym_node = action_key?(pair)
        register_offense(sym_node, node)
      end
    end
  end
end

def register_offense(sym_node, node)
  add_offense(sym_node) do |corrector|
    corrector.replace(node.source_range, "\"#{node.children[0]}\"")
  end
end