# File lib/rbot/core/filters_ui.rb, line 20
  def do_list(m, params)
    g = params[:group]
    ar = @bot.filter_names(g).map { |s| s.to_s }.sort!
    if ar.empty?
      if g
        msg = _("no filters in group %{g}") % {:g => g}
      else
        msg = _("no known filters")
      end
    else
      msg = _("known filters: ") << ar.join(", ") 
    end
    m.reply msg
  end