Make "rev-tree" more efficient and more useful.
Make "rev-tree" more efficient and more useful.

Slight change of output format: it now lists all parents on the same line.

This allows it to work on initial commits too (which have no parents), and
also makes the output format a lot more intuitive.

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git