Issue #3243422: Add a kernel test of WritableFileSystemValidator

tests/src/Kernel/ReadinessValidation/WritableFileSystemValidatorTest.php

@@ -100,8 +100,8 @@ class WritableFileSystemValidatorTest extends AutomaticUpdatesKernelTestBase {
    */
   public function testWritable(array $paths, array $expected_results): void {
     $files = vfsStream::setup('htdoc', 0777);
-    $files->addChild(vfsStream::newDirectory('root', $paths['root'] ? 0777: 0444));
-    $files->addChild(vfsStream::newDirectory('vendor', $paths['vendor'] ? 0777: 0444));
+    $files->addChild(vfsStream::newDirectory('root', $paths['root'] ? 0777 : 0444));
+    $files->addChild(vfsStream::newDirectory('vendor', $paths['vendor'] ? 0777 : 0444));
 
     $path_locator = $this->prophesize(PathLocator::class);
     $path_locator->getVendorDirectory()->willReturn(vfsStream::url('htdoc/vendor'));