refactor how expected lines are set

Author: mallardduck

tests/Unit/Drivers/TextDriverTest.php

@@ -33,12 +33,13 @@ public function it_can_serialize_when_given_OS_dependant_line_endings()
     {
         $driver = new TextDriver();
 
-        $expected = <<<EOF
-
-  GET|HEAD       / ..................................................... index
+        $expected = implode("\n", [
+            '',
+            '  GET|HEAD       / ..................................................... index',
+            '',
+            '                                                            Showing [1] routes'
+        ]);
 
-                                                            Showing [1] routes
-EOF;
         // Due to using PHP_EOL this should fail (conditionally) when run on windows
         $actual = implode(PHP_EOL, [
             '',