Used const variable in scheduler test.

plugin/pkg/scheduler/core/generic_scheduler.go

@@ -44,7 +44,7 @@ type FitError struct {
 
 var ErrNoNodesAvailable = fmt.Errorf("no nodes available to schedule pods")
 
-const NoNodeAvailableMsg = "No nodes are available that match all of the following predicates:"
+const NoNodeAvailableMsg = "No nodes are available that match all of the following predicates"
 
 // Error returns detailed information of why the pod failed to fit on each node
 func (f *FitError) Error() string {

plugin/pkg/scheduler/core/generic_scheduler_test.go

@@ -410,7 +410,7 @@ func TestHumanReadableFitError(t *testing.T) {
 			"3": []algorithm.PredicateFailureReason{algorithmpredicates.ErrNodeUnderDiskPressure},
 		},
 	}
-	if strings.Contains(error.Error(), "No nodes are available that match all of the following predicates") {
+	if strings.Contains(error.Error(), NoNodeAvailableMsg) {
 		if strings.Contains(error.Error(), "NodeUnderDiskPressure (2)") && strings.Contains(error.Error(), "NodeUnderMemoryPressure (1)") {
 			return
 		}