mantle: clean up kola/tests/upgrade/basic
This cleans up kola/tests/upgrade/basic.go.
Fixes part of
@@ -274,7 +274,7 @@ func undoZincatiDisablement(c cluster.TestCluster, m platform.Machine) {
func (g *Graph) sync(c cluster.TestCluster, m platform.Machine) {
b, err := json.Marshal(g)
if err != nil {
- c.Fatalf("failed to marshal graph: %v")
+ c.Fatalf("failed to marshal graph: %v", err)
}
if err := platform.InstallFile(bytes.NewReader(b), m, "graph.json"); err != nil {
