Update golang-lint CI to final v1 release: v1.64.8

.github/workflows/golangci.yaml

@@ -26,7 +26,7 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v6
         with:
-          version: v1.59
+          version: v1.64.8
 
   coverage:
     needs: [lint]

Makefile

@@ -37,7 +37,7 @@ htmlcov:
 
 lint:
 	$(info INFO: Starting build $@)
-	go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.59
+	go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.64.8
 	golangci-lint run --timeout 5m $(pkgs) || true
 
 vet:

outputs/outputs.go

@@ -231,7 +231,7 @@ func IsValidFormat(f string) bool {
 
 func GetOutputer(name string) (Outputer, error) {
 	if _, ok := outputers[name]; !ok {
-		return nil, fmt.Errorf("bad output format: " + name)
+		return nil, fmt.Errorf("bad output format: %v", name)
 	}
 	return outputers[name], nil
 }

outputs/prometheus_test.go

@@ -512,7 +512,7 @@ func TestPrometheusOutput(t *testing.T) {
 			assert.Equal(t, 0, exitCode)
 
 			output := buf.String()
-			t.Logf(output)
+			t.Logf("%v", output)
 			for _, metric := range testCase.expectedMetrics {
 				assert.Contains(t, output, metric)
 			}