chore: use gofumpt for code formatting

internal/provider/custom/connection.go

@@ -10,13 +10,12 @@ import (
 	"github.com/qdm12/gluetun/internal/models"
 )
 
-var (
-	ErrVPNTypeNotSupported = errors.New("VPN type not supported for custom provider")
-)
+var ErrVPNTypeNotSupported = errors.New("VPN type not supported for custom provider")
 
 // GetConnection gets the connection from the OpenVPN configuration file.
 func (p *Provider) GetConnection(selection settings.ServerSelection, _ bool) (
-	connection models.Connection, err error) {
+	connection models.Connection, err error,
+) {
 	switch selection.VPN {
 	case vpn.OpenVPN:
 		return getOpenVPNConnection(p.extractor, selection)
@@ -29,7 +28,8 @@ func (p *Provider) GetConnection(selection settings.ServerSelection, _ bool) (
 
 func getOpenVPNConnection(extractor Extractor,
 	selection settings.ServerSelection) (
-	connection models.Connection, err error) {
+	connection models.Connection, err error,
+) {
 	_, connection, err = extractor.Data(*selection.OpenVPN.ConfFile)
 	if err != nil {
 		return connection, fmt.Errorf("extracting connection: %w", err)
@@ -52,7 +52,8 @@ func getOpenVPNConnection(extractor Extractor,
 }
 
 func getWireguardConnection(selection settings.ServerSelection) (
-	connection models.Connection) {
+	connection models.Connection,
+) {
 	connection = models.Connection{
 		Type:        vpn.Wireguard,
 		IP:          selection.Wireguard.EndpointIP,

internal/provider/custom/openvpnconf.go

@@ -15,7 +15,8 @@ import (
 var ErrExtractData = errors.New("failed extracting information from custom configuration file")
 
 func (p *Provider) OpenVPNConfig(connection models.Connection,
-	settings settings.OpenVPN, ipv6Supported bool) (lines []string) {
+	settings settings.OpenVPN, ipv6Supported bool,
+) (lines []string) {
 	lines, _, err := p.extractor.Data(*settings.ConfFile)
 	if err != nil {
 		// Configuration file is already validated in settings validation in
@@ -30,7 +31,8 @@ func (p *Provider) OpenVPNConfig(connection models.Connection,
 }
 
 func modifyConfig(lines []string, connection models.Connection,
-	settings settings.OpenVPN, ipv6Supported bool) (modified []string) {
+	settings settings.OpenVPN, ipv6Supported bool,
+) (modified []string) {
 	// Remove some lines
 	for _, line := range lines {
 		switch {