t / t4013 / diff.show_initialon commit format_commit_message: honor `color=auto` for `%C(auto)` (b15a3e0)
   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$