修复使用FileRefreshableDataSource作为规则数据源时，初始化空规则文件会导致StringIndexOutOfBoun…#3587
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修复使用FileRefreshableDataSource作为规则数据源时，初始化空规则文件会导致StringIndexOutOfBoun…#3587genjigjj wants to merge 1 commit intoalibaba:1.8from
genjigjj wants to merge 1 commit intoalibaba:1.8from
