Issue #1683836 by mjonesdinero, lyricnz: Fix database topic sample code so it is consistent

core/includes/database.inc

@@ -44,7 +44,7 @@
  * $result = db_query_range('SELECT n.nid, n.title, n.created
  *   FROM {node} n WHERE n.uid = :uid', 0, 10, array(':uid' => $uid));
  * foreach ($result as $record) {
- *   // Perform operations on $node->title, etc. here.
+ *   // Perform operations on $record->title, etc. here.
  * }
  * @endcode
  * Curly braces are used around "node" to provide table prefixing via