trailing space

Author: ferdonline

core/src/main/scala/org/apache/spark/internal/config/package.scala

@@ -410,7 +410,7 @@ package object config {
       .doc("Remote block will be fetched to disk when size of the block is above this threshold " +
         "in bytes. This is to avoid a giant request takes too much memory. We can enable this " +
         "config by setting a specific value(e.g. 200m). Note this configuration will affect " +
-        "both shuffle fetch and block manager remote block fetch. For users who enabled " + 
+        "both shuffle fetch and block manager remote block fetch. For users who enabled " +
         "external shuffle service, this feature can only be worked when external shuffle" +
         "service is newer than Spark 2.2.")
       .bytesConf(ByteUnit.BYTE)