Index: file.php
===================================================================
--- file.php	(revision 53795)
+++ file.php	(working copy)
@@ -636,6 +636,17 @@
 		$theme->cache_delete();
 	}
 
+	/**
+	 * Fires after theme-plugin file edited (doc will be added, this is just a testing patch).
+	 *
+	 * @since 6.0.0
+	 *
+	 * @param string $real_file The file full path.
+	 * @param string $content New updated content.
+	 * @param string $previous_content Previous content.
+	 */
+	do_action( 'after_theme_plugin_file_edited', $real_file, $content, $previous_content );
+
 	return true;
 }