Issue #1852366 by xjm: Add missing parens to function @see refs in bootstrap.inc

core/includes/bootstrap.inc

@@ -323,14 +323,14 @@
 /**
  * $config_directories key for active directory.
  *
- * @see config_get_config_directory
+ * @see config_get_config_directory()
  */
 const CONFIG_ACTIVE_DIRECTORY = 'active';
 
 /**
  * $config_directories key for staging directory.
  *
- * @see config_get_config_directory
+ * @see config_get_config_directory()
  */
 const CONFIG_STAGING_DIRECTORY = 'staging';