Index: src/wp-includes/l10n.php
===================================================================
--- src/wp-includes/l10n.php	(revision 42707)
+++ src/wp-includes/l10n.php	(working copy)
@@ -720,7 +720,7 @@
  * @since 4.6.0 The function now tries to load the .mo file from the languages directory first.
  *
  * @param string $domain          Unique identifier for retrieving translated strings
- * @param string $deprecated      Optional. Use the $plugin_rel_path parameter instead. Default false.
+ * @param bool  $deprecated      Optional. Deprecated. Default false.
  * @param string $plugin_rel_path Optional. Relative path to WP_PLUGIN_DIR where the .mo file resides.
  *                                Default false.
  * @return bool True when textdomain is successfully loaded, false otherwise.