fix the lint issue

Author: hengfengli

google-cloud-spanner/src/main/java/com/google/cloud/spanner/SpannerOptions.java

@@ -1168,7 +1168,7 @@ protected Builder() {
       databaseAdminStubSettingsBuilder
           .updateDatabaseDdlOperationSettings()
           .setPollingAlgorithm(shortInitialPollingDelayAlgorithm);
- 
+
       // The polling setting with a long initial delay as we expect
       // the operation to take a bit long time to return.
       OperationTimedPollAlgorithm longInitialPollingDelayAlgorithm =
@@ -1182,7 +1182,7 @@ protected Builder() {
                   .setRpcTimeoutMultiplier(1.5)
                   .setTotalTimeoutDuration(Duration.ofHours(48L))
                   .build());
-     databaseAdminStubSettingsBuilder
+      databaseAdminStubSettingsBuilder
           .createBackupOperationSettings()
           .setPollingAlgorithm(longInitialPollingDelayAlgorithm);
       databaseAdminStubSettingsBuilder