Fix exception message

Author: ByScripts

.gitignore

@@ -38,4 +38,5 @@ vendor/
 
 # Commit your application's lock file http://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file
 # You may choose to ignore a library lock file http://getcomposer.org/doc/02-libraries.md#lock-file
-# composer.lock
+# composer.lock
+

src/StaticEntityManager.php

@@ -156,7 +156,7 @@ private function initDataSet()
         $dataSet = call_user_func(array($this->class, 'getDataSet'));
 
         if (!is_array($dataSet) || count($dataSet) !== count(array_filter($dataSet, 'is_array'))) {
-            throw new \Exception('DataSet for class %s seems invalid');
+            throw new \Exception(sprintf('DataSet for class %s seems invalid', $this->class));
         }
 
         $this->ids = array_keys($dataSet);