all: apply modernisers

Signed-off-by: Ophestra <cat@gensokyo.uk>

container/errors.go

@@ -46,9 +46,8 @@ func messageFromError(err error) (m string, ok bool) {
 // While this is usable for pointer errors, such use should be avoided as nil
 // check is omitted.
 func messagePrefix[T error](prefix string, err error) (string, bool) {
-	var targetError T
-	if errors.As(err, &targetError) {
-		return prefix + targetError.Error(), true
+	if e, ok := errors.AsType[T](err); ok {
+		return prefix + e.Error(), true
 	}
 	return zeroString, false
 }
@@ -58,9 +57,8 @@ func messagePrefixP[V any, T interface {
 	*V
 	error
 }](prefix string, err error) (string, bool) {
-	var targetError T
-	if errors.As(err, &targetError) && targetError != nil {
-		return prefix + targetError.Error(), true
+	if e, ok := errors.AsType[T](err); ok && e != nil {
+		return prefix + e.Error(), true
 	}
 	return zeroString, false
 }
@@ -109,8 +107,8 @@ func optionalErrorUnwrap(err error) error {
 
 // errnoFallback returns the concrete errno from an error, or a [os.PathError] fallback.
 func errnoFallback(op, path string, err error) (syscall.Errno, *os.PathError) {
-	var errno syscall.Errno
-	if !errors.As(err, &errno) {
+	errno, ok := errors.AsType[syscall.Errno](err)
+	if !ok {
 		return 0, &os.PathError{Op: op, Path: path, Err: err}
 	}
 	return errno, nil