Apply linter autofixes: internal/vaultik (refs #61)

internal/vaultik/vaultik.go

@@ -3,6 +3,7 @@ package vaultik
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -125,8 +126,9 @@ func (v *Vaultik) CanDecrypt() bool {
 // Returns an error if no recipients are configured
 func (v *Vaultik) GetEncryptor() (*crypto.Encryptor, error) {
 	if len(v.Config.AgeRecipients) == 0 {
-		return nil, fmt.Errorf("no age recipients configured")
+		return nil, errors.New("no age recipients configured")
 	}
+
 	return crypto.NewEncryptor(v.Config.AgeRecipients)
 }
 
@@ -134,8 +136,9 @@ func (v *Vaultik) GetEncryptor() (*crypto.Encryptor, error) {
 // Returns an error if no secret key is configured
 func (v *Vaultik) GetDecryptor() (*crypto.Decryptor, error) {
 	if v.Config.AgeSecretKey == "" {
-		return nil, fmt.Errorf("no age secret key configured")
+		return nil, errors.New("no age secret key configured")
 	}
+
 	return crypto.NewDecryptor(v.Config.AgeSecretKey)
 }
 
@@ -162,6 +165,7 @@ func (v *Vaultik) scanStdin(a ...any) (int, error) {
 // TestVaultik wraps a Vaultik with captured stdout/stderr for testing
 type TestVaultik struct {
 	*Vaultik
+
 	Stdout *bytes.Buffer
 	Stderr *bytes.Buffer
 	Stdin  *bytes.Buffer
@@ -175,6 +179,7 @@ func NewForTesting(storage storage.Storer) *TestVaultik {
 	stdout := &bytes.Buffer{}
 	stderr := &bytes.Buffer{}
 	stdin := &bytes.Buffer{}
+
 	return &TestVaultik{
 		Vaultik: &Vaultik{
 			Storage: storage,