Trim trailing whitespaces

Author: Aditya Deshpande

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/Constants.java

@@ -852,7 +852,7 @@ private Constants() {
   public static final String SIGNING_ALGORITHM_STS =
       "fs.s3a." + Constants.AWS_SERVICE_IDENTIFIER_STS.toLowerCase()
           + ".signing-algorithm";
-  
+
   @Deprecated
   public static final String S3N_FOLDER_SUFFIX = "_$folder$";
   public static final String FS_S3A_BLOCK_SIZE = "fs.s3a.block.size";