Subject: [BUG] "git pull" will regress between 'master' and 'pu'

From: Junio C Hamano <[email-masked]>
Date: Sat, 18 Apr 2015 18:39:20 -0700

This is primarily note-to-self; even though I haven't got around
bisecting yet, I think I know I did some bad change myself.

"git pull $URL $tag" seems to:

 * fail to invoke the editor without "--edit".
 * show the summary merge log message twice.