[MERGE][#157026] Fall back to showing e-mail in ``log --short/--line`` if the committer/author has only e-mail

[John Arbash Meinel]

John Arbash Meinel has voted approve.
Status is now: Approved
Comment:
as it has already been approved, I will merge it.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C1196870762.6294.8.camel%40laptop%3E