Issue #3278411: Always use FileSystemInterface::getTempDirectory() to get the temporary directory

package_manager/tests/src/Kernel/StageTest.php

@@ -70,8 +70,8 @@ class StageTest extends PackageManagerKernelTestBase {
     $this->assertEmpty(Settings::get('file_temp_path'));
     $expected_dir = FileSystem::getOsTemporaryDirectory() . "/.package_manager$site_id/$id";
     $this->assertSame($expected_dir, $stage->getStageDirectory());
-    // If the file_temp_path setting is changed, the existing stage should be
-    // unaffected...
+    // If the file_temp_path setting is changed, the existing stage shouldn't be
+    // affected...
     $this->setSetting('file_temp_path', '/junk/drawer');
     $this->assertSame($expected_dir, $stage->getStageDirectory());
     $stage->destroy();