Review comments

Author: Sital Kedia

core/src/main/java/org/apache/spark/memory/MemoryConsumer.java

@@ -17,11 +17,11 @@
 
 package org.apache.spark.memory;
 
+import java.io.IOException;
+
 import org.apache.spark.unsafe.array.LongArray;
 import org.apache.spark.unsafe.memory.MemoryBlock;
 
-import java.io.IOException;
-
 /**
  * A memory consumer of {@link TaskMemoryManager} that supports spilling.
  *