t / t4013 / diff.show_initialon commit trace2: find exec-dir before trace2 initialization (a7bc01e)
   1$ git show initial
   2commit 444ac553ac7612cc88969031b02b3767fb8a353a
   3Author: A U Thor <author@example.com>
   4Date:   Mon Jun 26 00:00:00 2006 +0000
   5
   6    Initial
   7$