t / t5100 / info0001on commit log --grep: use the same helper to set -E/-F options as "git grep" (34a4ae5)
   1Author: A (zzz) U Thor (Comment)
   2Email: a.u.thor@example.com
   3Subject: a commit.
   4Date: Fri, 9 Jun 2006 00:44:16 -0700
   5