# File lib/wirble.rb, line 425
    def self.enable(custom_colors = nil)
      # if there's a better way to do this, I'm all ears.
      ::IRB::Irb.class_eval do
        alias :non_color_output_value  :output_value

        def output_value
          if @context.inspect?
            val = Colorize.colorize(@context.last_value.inspect)
            printf @context.return_format, val
          else
            printf @context.return_format, @context.last_value
          end
        end
      end

      colors = custom_colors if custom_colors
    end