Add line break between opening tag and namespace

in generated Test and Cest files

Author: Naktibalda

src/Codeception/Lib/Generator/Cest.php

@@ -11,8 +11,8 @@ class Cest
     use Namespaces;
 
     protected $template = <<<EOF
-<?php {{namespace}}
-
+<?php
+{{namespace}}
 class {{name}}Cest
 {
     public function _before({{actor}} \$I)

src/Codeception/Lib/Generator/Test.php

@@ -11,7 +11,8 @@ class Test
     use Shared\Classname;
 
     protected $template = <<<EOF
-<?php {{namespace}}
+<?php
+{{namespace}}
 class {{name}}Test extends \Codeception\Test\Unit
 {
 {{tester}}