Remove trailing whitespace in files

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=135386752

java/google/registry/backup/BackupUtils.java

@@ -41,7 +41,7 @@ public class BackupUtils {
   }
 
   /**
-   * Converts the given {@link ImmutableObject} to a raw datastore entity and write it to an 
+   * Converts the given {@link ImmutableObject} to a raw datastore entity and write it to an
    * {@link OutputStream} in delimited protocol buffer format.
    */
   static void serializeEntity(ImmutableObject entity, OutputStream stream) throws IOException {