    # File lib/rbot/core/filters_ui.rb, line 45
      def do_search(m, params)
        l = @bot.filter_names.map { |s| s.to_s }
        pat = params[:pat].to_s
        sl = l.grep(Regexp.new(pat))
        if sl.empty?
          msg = _("no filters match %{pat}") % { :pat => pat }
        else
          msg = _("filters matching %{pat}: ") % { :pat => pat }
          msg << sl.sort!.join(", ")
        end
        m.reply msg
      end