HarmonyOS List的space问题

lanes的第二个参数即为间隔，如lanes(2,8) 2列，间隔为8。或见以下demo，设置间隔为20：

// ListLanesExample.ets
@Entry
@Component
struct ListLanesExample {
  @State arr: string[] =
    ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19"]
  @State alignListItem: ListItemAlign = ListItemAlign.Center

  build() {
    Column() {
      List({ space: 20, initialIndex: 0 }) {
        ForEach(this.arr, (item: string) => {
          ListItem() {
            Text('' + item)
              .width('100%')
              .height(100)
              .fontSize(16)
              .textAlign(TextAlign.Center)
              .borderRadius(10)
              .backgroundColor(0xFFFFFF)
          }
          .border({ width: 2, color: Color.Green })
        }, (item: string) => item)
      }
      .height(300)
      .width("90%")
      .friction(0.6)
      .border({ width: 3, color: Color.Red })
      .lanes({ minLength: 40, maxLength: 40 }, 20) //设置列数和间隔
      .alignListItem(this.alignListItem)
      .scrollBar(BarState.Off)
    }.width('100%').height('100%').backgroundColor(0xDCDCDC).padding({ top: 5 })
  }
}