Merge master (2.1.0) and fixed conflicts.
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php
index a66a16e..5f63a37 100644
--- a/system/database/drivers/pdo/pdo_driver.php
+++ b/system/database/drivers/pdo/pdo_driver.php
@@ -255,7 +255,11 @@
// Reset the transaction failure flag.
// If the $test_mode flag is set to TRUE transactions will be rolled back
// even if the queries produce a successful result.
+<<<<<<< HEAD
$this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;
+=======
+ $this->_trans_failure = (bool) ($test_mode === TRUE);
+>>>>>>> master
return $this->conn_id->beginTransaction();
}