cs fix

Author: michalsn

user_guide_src/source/outgoing/response/040.php

@@ -3,6 +3,7 @@
 // Any iterable of string chunks works, including generators.
 $chunks = static function (): \Generator {
     yield json_encode(['event' => 'started']) . "\n";
+
     yield json_encode(['event' => 'finished']) . "\n";
 };