Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/11747#discussion_r56310402
--- Diff: core/src/test/scala/org/apache/spark/LocalSparkContext.scala ---
@@ -27,12 +27,12 @@ trait LocalSparkContext extends BeforeAndAfterEach with
BeforeAndAfterAll { self
@transient var sc: SparkContext = _
- override def beforeAll() {
+ override def beforeAll(): Unit = {
--- End diff --
Although this change is not necessary or related, it's not wrong
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