figing code standard and some refactorings

Author: tiger-seo

src/Codeception/Util/sq.php

@@ -3,8 +3,12 @@
 
 function sq($id = null)
 {
-    if ($id and isset(Sequence::$hash[$id])) return Sequence::$hash[$id];
-    $sequence = '_'.uniqid();
-    if ($id) Sequence::$hash[$id] = $sequence;
+    if ($id and isset(Sequence::$hash[$id])) {
+        return Sequence::$hash[$id];
+    }
+    $sequence = '_' . uniqid();
+    if ($id) {
+        Sequence::$hash[$id] = $sequence;
+    }
     return $sequence;
 }