Docs: Properly mark the `$classname` parameter as optional.

See #32246.

Built from https://develop.svn.wordpress.org/trunk@36027


git-svn-id: http://core.svn.wordpress.org/trunk@35992 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/deprecated.php

@@ -2100,7 +2100,7 @@ function attribute_escape( $text ) {
  *
  * @param string|int $name            Widget ID.
  * @param callable   $output_callback Run when widget is called.
- * @param string $classname Classname widget option.
+ * @param string     $classname       Optional. Classname widget option. Default empty.
  * @param mixed      $params ,...     Widget parameters.
  */
 function register_sidebar_widget($name, $output_callback, $classname = '') {

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-36026';
+$wp_version = '4.5-alpha-36027';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.