format code (#7654)

Author: limingxinleo

tests/Cases/ValidateAttributesTest.php

@@ -125,7 +125,7 @@ public function __toString(): string
             }
         }));
 
-        $this->assertTrue($validator->validateJson('', new class {
+        $this->assertTrue($validator->validateJson('', new class implements Stringable {
             public function __toString(): string
             {
                 return json_encode(['foo' => 'bar'], JSON_UNESCAPED_UNICODE);

tests/Cases/ValidationValidatorTest.php

@@ -37,6 +37,7 @@
 use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
 use SplFileInfo;
+use Stringable;
 
 /**
  * @internal
@@ -2856,15 +2857,15 @@ public function testValidateEmail()
         $v = new Validator($trans, ['x' => ['not a string']], ['x' => 'Email']);
         $this->assertFalse($v->passes());
 
-        $v = new Validator($trans, ['x' => new class {
+        $v = new Validator($trans, ['x' => new class implements Stringable {
             public function __toString()
             {
                 return 'aslsdlks';
             }
         }], ['x' => 'Email']);
         $this->assertFalse($v->passes());
 
-        $v = new Validator($trans, ['x' => new class {
+        $v = new Validator($trans, ['x' => new class implements Stringable {
             public function __toString()
             {
                 return '[email protected]';