From: Anders Melchiorsen <hidden> Date: 2016-06-15 22:45:33
Anders Melchiorsen [off-list ref] writes:
While this is indeed documented, you cannot blame somebody for
thinking that a left out <src> will default to HEAD, as it does for
so many other commands.
I actually think that <src> defaulting to HEAD would be reasonable,
but it is probably less reasonable to change the meaning at this
point.
Anders