# File lib/mongo/cluster/topology/replica_set_no_primary.rb, line 48
        def summary
          details = server_descriptions.keys.join(',')
          if details != ''
            details << ','
          end
          details << "name=#{replica_set_name}"
          if max_set_version
            details << ",v=#{max_set_version}"
          end
          if max_election_id
            details << ",e=#{max_election_id && max_election_id.to_s.sub(/^0+/, '')}"
          end
          "#{display_name}[#{details}]"
        end