Illegal character `\r` can be contained in StagePage.

                   |width="$serializationTimeProportion%"></rect>
                 |<rect class="getting-result-time-proportion"
                   |x="$gettingResultTimeProportionPos%" y="0px" height="26px"
                   |width="$gettingResultTimeProportion%"></rect></svg>',
               |'start': new Date($launchTime),
               |'end': new Date($finishTime)
             |}
           |""".stripMargin.replaceAll("\n", " ")