Bug: Illegal character in path at index ...

[zhangpengshan]

If empty char in work folder, there would be a exception:

2020-10-22 08:38:58:ERROR StatsModelProcessor [main] - Error:java.lang.IllegalArgumentException: java.net.URISyntaxException: Illegal character in path at index 40: file:/...

  | java.lang.RuntimeException: java.lang.IllegalArgumentException: java.net.URISyntaxException: Illegal character in path at index 40: file:/risk_crm1/jiadchen/ATOM21/variable selection/first_iv_filter_10246_variables/first_iv_filter_10246_variables_0/binning_info.txt
  | at ml.shifu.shifu.core.processor.stats.MapReducerStatsWorker.doStats(MapReducerStatsWorker.java:152)
  | at ml.shifu.shifu.core.processor.StatsModelProcessor.run(StatsModelProcessor.java:246)
  | at ml.shifu.shifu.ShifuCLI.calModelStats(ShifuCLI.java:498)
  | at ml.shifu.shifu.ShifuCLI.main(ShifuCLI.java:235)