# File rbot/plugins.rb, line 185
    def help(topic="")
      if(topic =~ /^(\S+)\s*(.*)$/)
        key = $1
        params = $2
        if(@@plugins.has_key?(key))
          begin
            return @@plugins[key].help(key, params)
          rescue StandardError, NameError, SyntaxError => err
            puts "plugin #{@@plugins[key].name} help() failed: " + err
            puts err.backtrace.join("\n")
          end
        else
          return false
        end
      end
    end