make linter happier even in tests

Author: amberpixels

prometheus/promsafe/safe_test.go

@@ -16,6 +16,7 @@ package promsafe_test
 import (
 	"fmt"
 	"log"
+	"strconv"
 	"testing"
 
 	"github.com/prometheus/client_golang/prometheus"
@@ -113,8 +114,8 @@ type TestLabelsFast struct {
 func (t TestLabelsFast) ToPrometheusLabels() prometheus.Labels {
 	return prometheus.Labels{
 		"label1": t.Label1,
-		"label2": fmt.Sprintf("%d", t.Label2),
-		"label3": fmt.Sprintf("%t", t.Label3),
+		"label2": strconv.Itoa(t.Label2),
+		"label3": strconv.FormatBool(t.Label3),
 	}
 }
 func (t TestLabelsFast) ToLabelNames() []string {