diff --git a/wp-includes/class-wp-admin-bar.php b/wp-includes/class-wp-admin-bar.php
index 7d3470f538..2d8814e590 100644
--- a/wp-includes/class-wp-admin-bar.php
+++ b/wp-includes/class-wp-admin-bar.php
@@ -18,6 +18,8 @@ class WP_Admin_Bar {
 	public $user;
 
 	/**
+	 * @since 3.3.0
+	 *
 	 * @param string $name
 	 * @return string|array|void
 	 */
@@ -33,6 +35,9 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * Initializes the admin bar.
+	 *
+	 * @since 3.1.0
 	 */
 	public function initialize() {
 		$this->user = new stdClass;
@@ -82,7 +87,7 @@ class WP_Admin_Bar {
 	}
 
 	/**
-	 * Add a node (menu item) to the Admin Bar menu.
+	 * Adds a node (menu item) to the admin bar menu.
 	 *
 	 * @since 3.3.0
 	 *
@@ -93,7 +98,7 @@ class WP_Admin_Bar {
 	}
 
 	/**
-	 * Remove a node from the admin bar.
+	 * Removes a node from the admin bar.
 	 *
 	 * @since 3.1.0
 	 *
@@ -179,6 +184,8 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * @since 3.3.0
+	 *
 	 * @param array $args
 	 */
 	final protected function _set_node( $args ) {
@@ -188,6 +195,8 @@ class WP_Admin_Bar {
 	/**
 	 * Gets a node.
 	 *
+	 * @since 3.3.0
+	 *
 	 * @param string $id
 	 * @return object|void Node.
 	 */
@@ -199,6 +208,8 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * @since 3.3.0
+	 *
 	 * @param string $id
 	 * @return object|void
 	 */
@@ -217,6 +228,8 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * @since 3.3.0
+	 *
 	 * @return array|void
 	 */
 	final public function get_nodes() {
@@ -232,6 +245,8 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * @since 3.3.0
+	 *
 	 * @return array|void
 	 */
 	final protected function _get_nodes() {
@@ -243,7 +258,7 @@ class WP_Admin_Bar {
 	}
 
 	/**
-	 * Add a group to a toolbar menu node.
+	 * Adds a group to a toolbar menu node.
 	 *
 	 * Groups can be used to organize toolbar items into distinct sections of a toolbar menu.
 	 *
@@ -267,6 +282,8 @@ class WP_Admin_Bar {
 	/**
 	 * Remove a node.
 	 *
+	 * @since 3.1.0
+	 *
 	 * @param string $id The ID of the item.
 	 */
 	public function remove_node( $id ) {
@@ -274,6 +291,8 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * @since 3.3.0
+	 *
 	 * @param string $id
 	 */
 	final protected function _unset_node( $id ) {
@@ -281,6 +300,7 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * @since 3.1.0
 	 */
 	public function render() {
 		$root = $this->_bind();
@@ -290,6 +310,8 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * @since 3.3.0
+	 *
 	 * @return object|void
 	 */
 	final protected function _bind() {
@@ -426,6 +448,8 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * @since 3.3.0
+	 *
 	 * @param object $root
 	 */
 	final protected function _render( $root ) {
@@ -457,6 +481,8 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * @since 3.3.0
+	 *
 	 * @param object $node
 	 */
 	final protected function _render_container( $node ) {
@@ -472,6 +498,8 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * @since 3.3.0
+	 *
 	 * @param object $node
 	 */
 	final protected function _render_group( $node ) {
@@ -497,6 +525,8 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * @since 3.3.0
+	 *
 	 * @param object $node
 	 */
 	final protected function _render_item( $node ) {
@@ -596,6 +626,9 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * Adds menus to the admin bar.
+	 *
+	 * @since 3.1.0
 	 */
 	public function add_menus() {
 		// User-related, aligned right.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 9fb0c4e4b5..58426470f6 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-51875';
+$wp_version = '5.9-alpha-51876';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.