t / t5100 / info0011on commit packed_ref_iterator_begin(): iterate using `mmapped_ref_iterator` (d1cf155)
   1Author: A U Thor
   2Email: a.u.thor@example.com
   3Subject: Xyzzy
   4Date: Fri, 8 Aug 2008 13:08:37 +0200 (CEST)
   5