添加注释，修复一些bug

xiaoding721

2024-12-24 d0ce0f549cd0d63cac13c6dc14411c79d7dae113

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<?xml version="1.0" encoding="UTF-8"?>
<CalendarRuleGroup>
  <Name>LibCal_StartClosed</Name>
  <ParentName></ParentName>
  <Rules>
  </Rules>
</CalendarRuleGroup>