SonarQube code smells resolve #36

Source/Config/SplClassLoader.php

@@ -140,7 +140,8 @@ class SplClassLoader
      */
     public function loadClass(string $className): void
     {
-        if (null === $this->namespace || str_starts_with($className, $this->namespace . $this->namespaceSeparator)) {
+        $concatenateNamespace = $this->namespace . $this->namespaceSeparator;
+        if (null === $this->namespace || str_starts_with($className, $concatenateNamespace)) {
             $fileName = '';
             $namespace = '';
             if (false !== ($lastNsPos = strripos($className, $this->namespaceSeparator))) {