bos@124: digraph undo_manual {
bos@124: 	"first change" -> "second change";
bos@124: 	"second change" -> "third change";
bos@124: 	backout [label="back out\nsecond change", shape=box];
bos@124: 	"second change" -> backout;
bos@124: 	"third change" -> "manual\nmerge";
bos@124: 	backout -> "manual\nmerge";
bos@124: }