Fix go vet 1.25.4 "non-constant format string" issues

$ go version
go version go1.25.4 linux/amd64

$ go vet ./...
./init_dir.go:71:21: non-constant format string in call to (*github.com/rfjakob/gocryptfs/v2/internal/tlog.toggledLogger).Printf
./main.go:123:19: non-constant format string in call to (*github.com/rfjakob/gocryptfs/v2/internal/tlog.toggledLogger).Printf
./masterkey.go:29:20: non-constant format string in call to (*github.com/rfjakob/gocryptfs/v2/internal/tlog.toggledLogger).Printf
./masterkey.go:56:20: non-constant format string in call to (*github.com/rfjakob/gocryptfs/v2/internal/tlog.toggledLogger).Printf
./mount.go:415:20: non-constant format string in call to (*github.com/rfjakob/gocryptfs/v2/internal/tlog.toggledLogger).Printf
internal/tlog/log.go:76:18: non-constant format string in call to (*log.Logger).Printf
internal/syscallcompat/quirks.go:19:19: non-constant format string in call to (*github.com/rfjakob/gocryptfs/v2/internal/tlog.toggledLogger).Printf

6 files changed, 10 insertions, 10 deletions

diff --git a/init_dir.go b/init_dir.go
index 3546084..870604a 100644
--- a/init_dir.go
+++ b/init_dir.go
@@ -68,14 +68,14 @@ func initDir(args *argContainer) {
 			os.Exit(exitcodes.CipherDir)
 		}
 		if !args.xchacha && !stupidgcm.HasAESGCMHardwareSupport() {
-			tlog.Info.Printf(tlog.ColorYellow +
+			tlog.Info.Println(tlog.ColorYellow +
 				"Notice: Your CPU does not have AES-GCM acceleration. Consider using -xchacha for better performance." +
 				tlog.ColorReset)
 		}
 	}
 	// Choose password for config file
 	if len(args.extpass) == 0 && args.fido2 == "" {
-		tlog.Info.Printf("Choose a password for protecting your files.")
+		tlog.Info.Println("Choose a password for protecting your files.")
 	}
 	{
 		var password []byte
diff --git a/internal/syscallcompat/quirks.go b/internal/syscallcompat/quirks.go
index 110c00d..e30d605 100644
--- a/internal/syscallcompat/quirks.go
+++ b/internal/syscallcompat/quirks.go
@@ -16,5 +16,5 @@ const (
 )
 
 func logQuirk(s string) {
-	tlog.Info.Printf(tlog.ColorYellow + "DetectQuirks: " + s + tlog.ColorReset)
+	tlog.Info.Println(tlog.ColorYellow + "DetectQuirks: " + s + tlog.ColorReset)
 }
diff --git a/internal/tlog/log.go b/internal/tlog/log.go
index 62d791d..02c760c 100644
--- a/internal/tlog/log.go
+++ b/internal/tlog/log.go
@@ -73,7 +73,7 @@ func (l *toggledLogger) Printf(format string, v ...interface{}) {
 		return
 	}
 	msg := trimNewline(fmt.Sprintf(format, v...))
-	l.Logger.Printf(l.prefix + msg + l.postfix)
+	l.Logger.Print(l.prefix + msg + l.postfix)
 	if l.Wpanic {
 		l.Logger.Panic(wpanicMsg + msg)
 	}
diff --git a/main.go b/main.go
index cd643b5..62a7985 100644
--- a/main.go
+++ b/main.go
@@ -120,7 +120,7 @@ func changePassword(args *argContainer) {
 		tlog.Fatal.Println(err)
 		os.Exit(exitcodes.WriteConf)
 	}
-	tlog.Info.Printf(tlog.ColorGreen + "Password changed." + tlog.ColorReset)
+	tlog.Info.Println(tlog.ColorGreen + "Password changed." + tlog.ColorReset)
 }
 
 func main() {
diff --git a/masterkey.go b/masterkey.go
index d488441..c67c5d5 100644
--- a/masterkey.go
+++ b/masterkey.go
@@ -24,9 +24,9 @@ func unhexMasterKey(masterkey string, fromStdin bool) []byte {
 		tlog.Fatal.Printf("Master key has length %d but we require length %d", len(key), cryptocore.KeyLen)
 		os.Exit(exitcodes.MasterKey)
 	}
-	tlog.Info.Printf("Using explicit master key.")
+	tlog.Info.Println("Using explicit master key.")
 	if !fromStdin {
-		tlog.Info.Printf(tlog.ColorYellow +
+		tlog.Info.Println(tlog.ColorYellow +
 			"THE MASTER KEY IS VISIBLE VIA \"ps ax\" AND MAY BE STORED IN YOUR SHELL HISTORY!\n" +
 			"ONLY USE THIS MODE FOR EMERGENCIES" + tlog.ColorReset)
 	}
@@ -52,8 +52,8 @@ func handleArgsMasterkey(args *argContainer) (masterkey []byte) {
 	}
 	// "-zerokey"
 	if args.zerokey {
-		tlog.Info.Printf("Using all-zero dummy master key.")
-		tlog.Info.Printf(tlog.ColorYellow +
+		tlog.Info.Println("Using all-zero dummy master key.")
+		tlog.Info.Println(tlog.ColorYellow +
 			"ZEROKEY MODE PROVIDES NO SECURITY AT ALL AND SHOULD ONLY BE USED FOR TESTING." +
 			tlog.ColorReset)
 		return make([]byte, cryptocore.KeyLen)
diff --git a/mount.go b/mount.go
index 5c0f064..7f72773 100644
--- a/mount.go
+++ b/mount.go
@@ -412,7 +412,7 @@ func initGoFuse(rootNode fs.InodeEmbedder, args *argContainer) *fuse.Server {
 	mOpts := &fuseOpts.MountOptions
 	opts := make(map[string]string)
 	if args.allow_other {
-		tlog.Info.Printf(tlog.ColorYellow + "The option \"-allow_other\" is set. Make sure the file " +
+		tlog.Info.Println(tlog.ColorYellow + "The option \"-allow_other\" is set. Make sure the file " +
 			"permissions protect your data from unwanted access." + tlog.ColorReset)
 		mOpts.AllowOther = true
 		// Make the kernel check the file permissions for us