Fix stan

Author: o0h

Diff for: src/Differ/DiffCollector.php

@@ -80,7 +80,7 @@ public function getPhpDiffs(bool $includeNonAstChanged = true): array
     /**
      * Get the non-PHP diffs.
      *
-     * @return array<Diff> the array of non-PHP diffs
+     * @return list<Diff> the array of non-PHP diffs
      */
     public function getNonPhpDiffs(): array
     {

Diff for: tests/unit/Differ/DiffFactoryTest.php

@@ -28,7 +28,6 @@ public function testCreateForNonPhp(): void
 
         $diff = $subject->createForNonPhp($path, $status);
 
-        $this->assertInstanceOf(Diff::class, $diff);
         $this->assertSame($path, $diff->path);
         $this->assertSame($status, $diff->status);
     }