NGSTACK-938 fix phpstan only booleans allowed in ternary operator condition

Author: JakovKnezovicc

src/Action/CheckPrettier.php

@@ -44,7 +44,12 @@ protected function doExecute(Config $config, IO $io, Repository $repository, Act
                 $result = $this->checkPrettier($file->getPath(), $prettierCommand, $formatOptions);
 
                 $io->write(sprintf('<info>%s: </info>', $file->getPath()));
-                $result['success'] ? $io->write($result['output']) : $io->writeError(sprintf('<error>%s</error>', $result['error']));
+
+                if ($result['success']) {
+                    $io->write($result['output']);
+                } else {
+                    $io->writeError(sprintf('<error>%s</error>', $result['error']));
+                }
 
                 if ($result['success'] !== true) {
                     $this->throwError($action, $io);