    # File lib/rbot/core/config.rb, line 10
      def version_string
        if $version_timestamp.to_i > 0
          ago = _(" [%{secs} ago]") % {
            :secs => Utils.secs_to_string(Time.now.to_i - $version_timestamp.to_i)
          }
        else
          ago = ''
        end
        _("I'm a v. %{version}%{ago} rubybot%{copyright}%{url}") % {
          :version => $version,
          :ago => ago,
          :copyright => ", #{Irc::Bot::COPYRIGHT_NOTICE}",
          :url => " - #{Irc::Bot::SOURCE_URL}"
        }
      end