    # File lib/rbot/core/config.rb, line 216
      def help(plugin, topic="")
        case plugin
        when "config"
          case topic
          when "list"
          _("config list => list configuration modules, config list <module> => list configuration keys for module <module>")
          when "get"
          _("config get <key> => get configuration value for key <key>")
          when "unset"
          _("reset key <key> to the default")
          when "set"
          _("config set <key> <value> => set configuration value for key <key> to <value>")
          when "desc"
          _("config desc <key> => describe what key <key> configures")
          when "add"
          _("config add <value> to <key> => add value <value> to key <key> if <key> is an array")
          when "rm"
          _("config rm <value> from <key> => remove value <value> from key <key> if <key> is an array")
          else
          _("config module - bot configuration. usage: list, desc, get, set, unset, add, rm")
          # else
          #   "no help for config #{topic}"
          end
        when "nick"
          _("nick <newnick> => change the bot nick to <newnick>, if possible")
        when "status"
          _("status => display some information on the bot's status")
        when "save"
          _("save => save current dynamic data and configuration")
        when "rescan"
          _("rescan => reload modules and static facts")
        when "version"
          _("version => describes software version")
        else
          _("config-related tasks: config, save, rescan, version, nick, status")
        end
      end