dont wrap natural Stringers

stringer.go

@@ -18,5 +18,8 @@ func Stringer[T any](v *T) fmt.Stringer {
 	if x, ok := any(*v).(fmt.Stringer); ok {
 		return x
 	}
+	if x, ok := any(v).(fmt.Stringer); ok {
+		return x
+	}
 	return stringizer[T]{v}
 }

stringer_test.go

@@ -5,6 +5,18 @@ import (
 	"testing"
 )
 
+type testStringer struct{}
+
+func (s testStringer) String() string {
+	return "I_Am_A_testStringer"
+}
+
+type testPtrStringer struct{}
+
+func (s *testPtrStringer) String() string {
+	return "I_Am_A_testPtrStringer"
+}
+
 func TestStringer(t *testing.T) {
 	txt := "text"
 	stringer := Stringer(&txt)
@@ -27,7 +39,7 @@ func TestStringer(t *testing.T) {
 	teststringer := testStringer{}
 	stringer = Stringer(&teststringer)
 	if !reflect.DeepEqual(stringer, teststringer) {
-		t.Error("not equal")
+		t.Errorf("%#v != %#v", stringer, teststringer)
 	}
 	if s := stringer.String(); s != (testStringer{}).String() {
 		t.Error(s)
@@ -36,4 +48,16 @@ func TestStringer(t *testing.T) {
 		t.Error(tags)
 	}
 
+	testptrstringer := &testPtrStringer{}
+	stringer = Stringer(testptrstringer)
+	if !reflect.DeepEqual(stringer, testptrstringer) {
+		t.Errorf("%#v != %#v", stringer, testptrstringer)
+	}
+	if s := stringer.String(); s != (&testPtrStringer{}).String() {
+		t.Error(s)
+	}
+	if tags := MustTagExpand(nil, stringer); !reflect.DeepEqual(tags, []any{testptrstringer}) {
+		t.Error(tags)
+	}
+
 }

ui_test.go

@@ -10,12 +10,6 @@ import (
 	"github.com/linkdata/deadlock"
 )
 
-type testStringer struct{}
-
-func (s testStringer) String() string {
-	return "I_Am_A_testStringer"
-}
-
 func TestRequest_NewElement_DebugPanicsIfNotComparable(t *testing.T) {
 	notHashableUI := struct {
 		*UiSpan