BUGFIX EXTREST-143 Fix incorrect line formatting

Author: Alexandr Bashurov

src/Api/Client.php

@@ -361,7 +361,7 @@ private function arrayToXml(array $array, SimpleXMLElement $xml, $parentEl = nul
             $el = is_int($key) && $parentEl ? $parentEl : $key;
             if (is_array($value)) {
                 $this->arrayToXml($value, $this->isAssocArray($value) ? $xml->addChild($el) : $xml, $el);
-            } elseif(!isset($xml->{$el})) {
+            } elseif (!isset($xml->{$el})) {
                 $xml->{$el} = (string) $value;
             } else {
                 $xml->{$el}[] = (string) $value;