t / t5100 / info0016--no-inbody-headerson commit bash: teach __git_ps1 about REVERT_HEAD (3ee4452)
   1Author: A U Thor
   2Email: a.u.thor@example.com
   3Subject: check bogus body header (date)
   4Date: Fri, 9 Jun 2006 00:44:16 -0700
   5