Update rector.php

Author: Kanti

rector.php

@@ -14,7 +14,7 @@
     $rectorConfig->cacheDirectory('./var/cache/rector');
 
     $rectorConfig->paths(
-        explode("\n", shell_exec("git ls-files | grep '\.php$'"))
+        array_filter(explode("\n", shell_exec("git ls-files | grep '\.php$'")))
     );
 
     // define sets of rules