Polishing.

Reformat code.

See #3847
Original pull request: #3848.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/DocumentPointerFactory.java

@@ -91,8 +91,10 @@ class DocumentPointerFactory {
 			if (idProperty.hasExplicitWriteTarget()
 					&& conversionService.canConvert(idValue.getClass(), idProperty.getFieldType())) {
 				return () -> conversionService.convert(idValue, idProperty.getFieldType());
-			} else if (idValue instanceof String && ObjectId.isValid((String)idValue)) {
-				return () -> new ObjectId((String)idValue);
+			}
+
+			if (idValue instanceof String && ObjectId.isValid((String) idValue)) {
+				return () -> new ObjectId((String) idValue);
 			}
 
 			return () -> idValue;