handle_rails_rc!

# File railties/lib/rails/generators/rails/app/app_generator.rb, line 468
        def handle_rails_rc!(argv)
          if argv.find { |arg| arg == '--no-rc' }
            argv.reject { |arg| arg == '--no-rc' }
          else
            railsrc(argv) { |rc_argv, rc| insert_railsrc_into_argv!(rc_argv, rc) }
          end
        end