apache/incubator-spark — pull request #574 by ash211 (2014-02-10 08:22:04+00:00)
Title: Keep GitHub pull request title as commit summary

The first line of a git commit message is the line that's used with many git
tools as the most concise textual description of that message. The most
common use that I see is in the short log, which is a one line per commit
log of recent commits.

This commit moves the line

Merge pull request #%s from %s.

Lower into the message to reserve the first line of the resulting commit for
the much more important pull request title.

http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html