fix OER NULL and SEQUENCE extensions round-trip
diff --git a/skeletons/oer_encoder.h b/skeletons/oer_encoder.h
index 252bd6a..6a7b681 100644
--- a/skeletons/oer_encoder.h
+++ b/skeletons/oer_encoder.h
@@ -48,8 +48,8 @@
 /*
  * Write out the Open Type (X.696 (08/2015), #30).
  * RETURN VALUES:
- *      -1:     Fatal error encoding the type.
- *     >=0:     Number of bytes serialized.
+ *  -1: Fatal error encoding the type.
+ *  >0: Number of bytes serialized.
  */
 ssize_t oer_open_type_put(const struct asn_TYPE_descriptor_s *td,
                           const asn_oer_constraints_t *constraints,