style: gofumpt all the things (#9829)

Literally `gofumpt -w .` from the top level dir. Guaranteed to be minor
style changes only and nothing else.

@imsodin per request?

lib/syncthing/debug.go

@@ -10,9 +10,7 @@ import (
 	"github.com/syncthing/syncthing/lib/logger"
 )
 
-var (
-	l = logger.DefaultLogger.NewFacility("app", "Main run facility")
-)
+var l = logger.DefaultLogger.NewFacility("app", "Main run facility")
 
 func shouldDebug() bool {
 	return l.ShouldDebug("app")

lib/syncthing/utils.go

@@ -33,7 +33,7 @@ func EnsureDir(dir string, mode fs.FileMode) error {
 		// Apparently the stat may fail even though the mkdirall passed. If it
 		// does, we'll just assume things are in order and let other things
 		// fail (like loading or creating the config...).
-		currentMode := fi.Mode() & 0777
+		currentMode := fi.Mode() & 0o777
 		if currentMode != mode {
 			err := fs.Chmod(".", mode)
 			// This can fail on crappy filesystems, nothing we can do about it.
@@ -139,7 +139,7 @@ func copyFile(src, dst string) error {
 		return err
 	}
 
-	if err := os.WriteFile(dst, bs, 0600); err != nil {
+	if err := os.WriteFile(dst, bs, 0o600); err != nil {
 		// Attempt to clean up
 		os.Remove(dst)
 		return err