Merge pull request #2627 from vlakoff/develop-3

Adjust a few phpdoc in query builder code
diff --git a/system/database/DB_query_builder.php b/system/database/DB_query_builder.php
index fb314e5..a36501e 100644
--- a/system/database/DB_query_builder.php
+++ b/system/database/DB_query_builder.php
@@ -1152,7 +1152,7 @@
 
 			// Do we have a seed value?
 			$orderby = ctype_digit((string) $orderby)
-				? $orderby = sprintf($this->_random_keyword[1], $orderby)
+				? sprintf($this->_random_keyword[1], $orderby)
 				: $this->_random_keyword[0];
 		}
 		elseif (empty($orderby))