t / t5100 / info0011on commit revision.h: make show_early_output an extern which is defined in revision.c (4dc1db0)
   1Author: A U Thor
   2Email: a.u.thor@example.com
   3Subject: Xyzzy
   4Date: Fri, 8 Aug 2008 13:08:37 +0200 (CEST)
   5