Fix linters

pkg/geoipupdate/config.go

@@ -225,7 +225,7 @@ func setConfigFromFile(config *Config, path string) error {
 		case "AccountID", "UserId":
 			accountID, err := strconv.Atoi(value)
 			if err != nil {
-				return fmt.Errorf("invalid account ID format")
+				return errors.New("invalid account ID format")
 			}
 			config.AccountID = accountID
 			keysSeen["AccountID"] = struct{}{}
@@ -286,7 +286,7 @@ func setConfigFromEnv(config *Config) error {
 		var err error
 		config.AccountID, err = strconv.Atoi(value)
 		if err != nil {
-			return fmt.Errorf("invalid account ID format")
+			return errors.New("invalid account ID format")
 		}
 	}
 
@@ -300,7 +300,7 @@ func setConfigFromEnv(config *Config) error {
 
 		config.AccountID, err = strconv.Atoi(strings.TrimSpace(string(accountID)))
 		if err != nil {
-			return fmt.Errorf("invalid account ID format")
+			return errors.New("invalid account ID format")
 		}
 	}
 
@@ -396,15 +396,15 @@ func validateConfig(config *Config) error {
 	}
 
 	if len(config.EditionIDs) == 0 {
-		return fmt.Errorf("the `EditionIDs` option is required")
+		return errors.New("the `EditionIDs` option is required")
 	}
 
 	if config.AccountID == 0 {
-		return fmt.Errorf("the `AccountID` option is required")
+		return errors.New("the `AccountID` option is required")
 	}
 
 	if config.LicenseKey == "" {
-		return fmt.Errorf("the `LicenseKey` option is required")
+		return errors.New("the `LicenseKey` option is required")
 	}
 
 	return nil

pkg/geoipupdate/internal/job_processor_test.go

@@ -2,6 +2,7 @@ package internal
 
 import (
 	"context"
+	"strings"
 	"sync"
 	"testing"
 	"time"
@@ -61,8 +62,9 @@ func TestJobQueueRun(t *testing.T) {
 			// Execute run in a goroutine so that we can exit early if the test
 			// hangs or takes too long to execute.
 			go func() {
-				err := jobProcessor.Run(ctx)
-				require.NoError(t, err)
+				if err := jobProcessor.Run(ctx); err != nil {
+					t.Error(err)
+				}
 				close(doneCh)
 			}()
 
@@ -106,7 +108,12 @@ func TestJobQueueStop(t *testing.T) {
 	// hangs or takes too long to execute.
 	go func() {
 		err := jobProcessor.Run(ctx)
-		require.ErrorContains(t, err, "processing cancelled")
+		if err == nil {
+			t.Error(`expected "processing cancelled" error`)
+		}
+		if !strings.Contains(err.Error(), "processing cancelled") {
+			t.Errorf(`expected "processing cancelled" error, got %q`, err)
+		}
 		close(doneCh)
 	}()