Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/23102#discussion_r236341337
--- Diff: core/src/main/scala/org/apache/spark/deploy/DependencyUtils.scala
---
@@ -61,11 +61,13 @@ private[deploy] object DependencyUtils extends Logging {
hadoopConf: Configuration,
secMgr: SecurityManager): String = {
val targetDir = Utils.createTempDir()
+ val fileSeparator = Pattern.quote(File.separator)
--- End diff --
Mind elaborating why this should be quoted
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