diff --git a/wp-admin/includes/file.php b/wp-admin/includes/file.php
index 98e0f4962c..052c235e15 100644
--- a/wp-admin/includes/file.php
+++ b/wp-admin/includes/file.php
@@ -733,9 +733,16 @@ function validate_file_to_edit( $file, $allowed_files = array() ) {
  *
  * @see wp_handle_upload_error
  *
- * @param string[]       $file      Reference to a single element of `$_FILES`.
- *                                  Call the function once for each uploaded file.
- * @param array|false    $overrides {
+ * @param array       $file      {
+ *     Reference to a single element from `$_FILES`. Call the function once for each uploaded file.
+ *
+ *     @type string $name     The original name of the file on the client machine.
+ *     @type string $type     The mime type of the file, if the browser provided this information.
+ *     @type string $tmp_name The temporary filename of the file in which the uploaded file was stored on the server.
+ *     @type int    $size     The size, in bytes, of the uploaded file.
+ *     @type int    $error    The error code associated with this file upload.
+ * }
+ * @param array|false $overrides {
  *     An array of override parameters for this file, or boolean false if none are provided.
  *
  *     @type callable $upload_error_handler     Function to call when there is an error during the upload process.
@@ -749,11 +756,17 @@ function validate_file_to_edit( $file, $allowed_files = array() ) {
  *     @type bool     $test_type                Whether to test that the mime type of the file is as expected.
  *     @type string[] $mimes                    Array of allowed mime types keyed by their file extension regex.
  * }
- * @param string         $time      Time formatted in 'yyyy/mm'.
- * @param string         $action    Expected value for `$_POST['action']`.
- * @return string[] On success, returns an associative array of file attributes.
- *                  On failure, returns `$overrides['upload_error_handler']( &$file, $message )`
- *                  or `array( 'error' => $message )`.
+ * @param string      $time      Time formatted in 'yyyy/mm'.
+ * @param string      $action    Expected value for `$_POST['action']`.
+ * @return array {
+ *     On success, returns an associative array of file attributes.
+ *     On failure, returns `$overrides['upload_error_handler']( &$file, $message )`
+ *     or `array( 'error' => $message )`.
+ *
+ *     @type string $file Filename of the newly-uploaded file.
+ *     @type string $url  URL of the newly-uploaded file.
+ *     @type string $type Mime type of the newly-uploaded file.
+ * }
  */
 function _wp_handle_upload( &$file, $overrides, $time, $action ) {
 	// The default error handler.
@@ -776,7 +789,15 @@ function _wp_handle_upload( &$file, $overrides, $time, $action ) {
 	 * @since 2.9.0 as 'wp_handle_upload_prefilter'.
 	 * @since 4.0.0 Converted to a dynamic hook with `$action`.
 	 *
-	 * @param string[] $file An array of data for the file. Reference to a single element of `$_FILES`.
+	 * @param array $file {
+	 *     Reference to a single element from `$_FILES`.
+	 *
+	 *     @type string $name     The original name of the file on the client machine.
+	 *     @type string $type     The mime type of the file, if the browser provided this information.
+	 *     @type string $tmp_name The temporary filename of the file in which the uploaded file was stored on the server.
+	 *     @type int    $size     The size, in bytes, of the uploaded file.
+	 *     @type int    $error    The error code associated with this file upload.
+	 * }
 	 */
 	$file = apply_filters( "{$action}_prefilter", $file );
 
@@ -794,7 +815,15 @@ function _wp_handle_upload( &$file, $overrides, $time, $action ) {
 	 *
 	 * @param array|false $overrides An array of override parameters for this file. Boolean false if none are
 	 *                               provided. @see _wp_handle_upload().
-	 * @param string[]    $file      An array of data for the file. Reference to a single element of `$_FILES`.
+	 * @param array       $file      {
+	 *     Reference to a single element from `$_FILES`.
+	 *
+	 *     @type string $name     The original name of the file on the client machine.
+	 *     @type string $type     The mime type of the file, if the browser provided this information.
+	 *     @type string $tmp_name The temporary filename of the file in which the uploaded file was stored on the server.
+	 *     @type int    $size     The size, in bytes, of the uploaded file.
+	 *     @type int    $error    The error code associated with this file upload.
+	 * }
 	 */
 	$overrides = apply_filters( "{$action}_overrides", $overrides, $file );
 
@@ -935,7 +964,15 @@ function _wp_handle_upload( &$file, $overrides, $time, $action ) {
 	 * @since 4.9.0
 	 *
 	 * @param mixed    $move_new_file If null (default) move the file after the upload.
-	 * @param string[] $file          An array of data for a single file.
+	 * @param array    $file          {
+	 *     Reference to a single element from `$_FILES`.
+	 *
+	 *     @type string $name     The original name of the file on the client machine.
+	 *     @type string $type     The mime type of the file, if the browser provided this information.
+	 *     @type string $tmp_name The temporary filename of the file in which the uploaded file was stored on the server.
+	 *     @type int    $size     The size, in bytes, of the uploaded file.
+	 *     @type int    $error    The error code associated with this file upload.
+	 * }
 	 * @param string   $new_file      Filename of the newly-uploaded file.
 	 * @param string   $type          Mime type of the newly-uploaded file.
 	 */
@@ -1017,12 +1054,12 @@ function _wp_handle_upload( &$file, $overrides, $time, $action ) {
  *
  * @param array       $file      Reference to a single element of `$_FILES`.
  *                               Call the function once for each uploaded file.
+ *                               See _wp_handle_upload() for accepted values.
  * @param array|false $overrides Optional. An associative array of names => values
  *                               to override default variables. Default false.
+ *                               See _wp_handle_upload() for accepted values.
  * @param string      $time      Optional. Time formatted in 'yyyy/mm'. Default null.
- * @return array On success, returns an associative array of file attributes.
- *               On failure, returns `$overrides['upload_error_handler']( &$file, $message )`
- *               or `array( 'error' => $message )`.
+ * @return array See _wp_handle_upload() for return value.
  */
 function wp_handle_upload( &$file, $overrides = false, $time = null ) {
 	/*
@@ -1048,12 +1085,12 @@ function wp_handle_upload( &$file, $overrides = false, $time = null ) {
  *
  * @param array       $file      Reference to a single element of `$_FILES`.
  *                               Call the function once for each uploaded file.
+ *                               See _wp_handle_upload() for accepted values.
  * @param array|false $overrides Optional. An associative array of names => values
  *                               to override default variables. Default false.
+ *                               See _wp_handle_upload() for accepted values.
  * @param string      $time      Optional. Time formatted in 'yyyy/mm'. Default null.
- * @return array On success, returns an associative array of file attributes.
- *               On failure, returns `$overrides['upload_error_handler']( &$file, $message )`
- *               or `array( 'error' => $message )`.
+ * @return array See _wp_handle_upload() for return value.
  */
 function wp_handle_sideload( &$file, $overrides = false, $time = null ) {
 	/*
diff --git a/wp-includes/block-supports/elements.php b/wp-includes/block-supports/elements.php
index 4e43dda375..3496095651 100644
--- a/wp-includes/block-supports/elements.php
+++ b/wp-includes/block-supports/elements.php
@@ -12,9 +12,9 @@
  * @since 5.8.0
  * @access private
  *
- * @param string $block_content Rendered block content.
- * @param array  $block         Block object.
- * @return string Filtered block content.
+ * @param  string $block_content Rendered block content.
+ * @param  array  $block         Block object.
+ * @return string                Filtered block content.
  */
 function wp_render_elements_support( $block_content, $block ) {
 	$link_color = null;
@@ -23,11 +23,11 @@ function wp_render_elements_support( $block_content, $block ) {
 	}
 
 	/*
-	 * For now we only care about link color.
-	 * This code in the future when we have a public API
-	 * should take advantage of WP_Theme_JSON::compute_style_properties
-	 * and work for any element and style.
-	 */
+	* For now we only care about link color.
+	* This code in the future when we have a public API
+	* should take advantage of WP_Theme_JSON::compute_style_properties
+	* and work for any element and style.
+	*/
 	if ( null === $link_color ) {
 		return $block_content;
 	}
diff --git a/wp-includes/block-supports/layout.php b/wp-includes/block-supports/layout.php
index 16e070a7d3..a28a51b4a3 100644
--- a/wp-includes/block-supports/layout.php
+++ b/wp-includes/block-supports/layout.php
@@ -35,9 +35,9 @@ function wp_register_layout_support( $block_type ) {
  * @since 5.8.0
  * @access private
  *
- * @param string $block_content Rendered block content.
- * @param array  $block         Block object.
- * @return string Filtered block content.
+ * @param  string $block_content Rendered block content.
+ * @param  array  $block         Block object.
+ * @return string                Filtered block content.
  */
 function wp_render_layout_support_flag( $block_content, $block ) {
 	$block_type     = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
diff --git a/wp-includes/block-template-utils.php b/wp-includes/block-template-utils.php
index 5658d1e552..2c5b68707b 100644
--- a/wp-includes/block-template-utils.php
+++ b/wp-includes/block-template-utils.php
@@ -103,9 +103,8 @@ function get_block_templates( $query = array(), $template_type = 'wp_template' )
  *
  * @since 5.8.0
  *
- * @param string $id Template unique identifier (example: theme_slug//template_slug).
- * @param string $template_type wp_template.
- *
+ * @param string $id            Template unique identifier (example: theme_slug//template_slug).
+ * @param string $template_type Optional. The template type (post type). Default 'wp_template'.
  * @return WP_Block_Template|null Template.
  */
 function get_block_template( $id, $template_type = 'wp_template' ) {
diff --git a/wp-includes/class-http.php b/wp-includes/class-http.php
index 703a74e208..6a69b2462d 100644
--- a/wp-includes/class-http.php
+++ b/wp-includes/class-http.php
@@ -110,7 +110,7 @@ class WP_Http {
 	 *                                             Some transports technically allow others, but should not be
 	 *                                             assumed. Default 'GET'.
 	 *     @type float        $timeout             How long the connection should stay open in seconds. Default 5.
-	 *     @type int          $redirection         Number of allowed redirects. Not supported by all transports.
+	 *     @type int          $redirection         Number of allowed redirects. Not supported by all transports
 	 *                                             Default 5.
 	 *     @type string       $httpversion         Version of the HTTP protocol to use. Accepts '1.0' and '1.1'.
 	 *                                             Default '1.0'.
diff --git a/wp-includes/class-wp-http-requests-hooks.php b/wp-includes/class-wp-http-requests-hooks.php
index e9177d5602..c54fdc0b8f 100644
--- a/wp-includes/class-wp-http-requests-hooks.php
+++ b/wp-includes/class-wp-http-requests-hooks.php
@@ -63,7 +63,7 @@ class WP_HTTP_Requests_Hooks extends Requests_Hooks {
 		 *
 		 * This action maps Requests internal hook to a native WordPress action.
 		 *
-		 * @see https://github.com/rmccue/Requests/blob/master/docs/hooks.md
+		 * @see https://github.com/WordPress/Requests/blob/master/docs/hooks.md
 		 *
 		 * @since 4.7.0
 		 *
diff --git a/wp-includes/class-wp-query.php b/wp-includes/class-wp-query.php
index 09c6a22b0d..bc1131ed5b 100644
--- a/wp-includes/class-wp-query.php
+++ b/wp-includes/class-wp-query.php
@@ -18,7 +18,7 @@
 class WP_Query {
 
 	/**
-	 * Query vars set by the user.
+	 * Query vars set by the user
 	 *
 	 * @since 1.5.0
 	 * @var array
@@ -26,7 +26,7 @@ class WP_Query {
 	public $query;
 
 	/**
-	 * Query vars, after parsing.
+	 * Query vars, after parsing
 	 *
 	 * @since 1.5.0
 	 * @var array
@@ -34,7 +34,7 @@ class WP_Query {
 	public $query_vars = array();
 
 	/**
-	 * Taxonomy query, as passed to get_tax_sql().
+	 * Taxonomy query, as passed to get_tax_sql()
 	 *
 	 * @since 3.1.0
 	 * @var WP_Tax_Query A taxonomy query instance.
@@ -42,7 +42,7 @@ class WP_Query {
 	public $tax_query;
 
 	/**
-	 * Metadata query container.
+	 * Metadata query container
 	 *
 	 * @since 3.2.0
 	 * @var WP_Meta_Query A meta query instance.
@@ -50,7 +50,7 @@ class WP_Query {
 	public $meta_query = false;
 
 	/**
-	 * Date query container.
+	 * Date query container
 	 *
 	 * @since 3.7.0
 	 * @var WP_Date_Query A date query instance.
@@ -92,7 +92,7 @@ class WP_Query {
 	public $posts;
 
 	/**
-	 * The number of posts for the current query.
+	 * The amount of posts for the current query.
 	 *
 	 * @since 1.5.0
 	 * @var int
@@ -135,7 +135,7 @@ class WP_Query {
 	public $comments;
 
 	/**
-	 * The number of comments for the posts.
+	 * The amount of comments for the posts.
 	 *
 	 * @since 2.2.0
 	 * @var int
@@ -159,7 +159,7 @@ class WP_Query {
 	public $comment;
 
 	/**
-	 * The number of found posts for the current query.
+	 * The amount of found posts for the current query.
 	 *
 	 * If limit clause was not used, equals $post_count.
 	 *
@@ -169,7 +169,7 @@ class WP_Query {
 	public $found_posts = 0;
 
 	/**
-	 * The number of pages.
+	 * The amount of pages.
 	 *
 	 * @since 2.1.0
 	 * @var int
@@ -177,7 +177,7 @@ class WP_Query {
 	public $max_num_pages = 0;
 
 	/**
-	 * The number of comment pages.
+	 * The amount of comment pages.
 	 *
 	 * @since 2.7.0
 	 * @var int
diff --git a/wp-includes/class-wp-term-query.php b/wp-includes/class-wp-term-query.php
index 3fd72993cd..b787d18617 100644
--- a/wp-includes/class-wp-term-query.php
+++ b/wp-includes/class-wp-term-query.php
@@ -92,23 +92,22 @@ class WP_Term_Query {
 	 * @param string|array $query {
 	 *     Optional. Array or query string of term query parameters. Default empty.
 	 *
-	 *     @type string|array $taxonomy               Taxonomy name, or array of taxonomies, to which results should
+	 *     @type string|array $taxonomy               Taxonomy name, or array of taxonomy names, to which results should
 	 *                                                be limited.
-	 *     @type int|int[]    $object_ids             Object ID, or array of object IDs. Results will be
+	 *     @type int|int[]    $object_ids             Optional. Object ID, or array of object IDs. Results will be
 	 *                                                limited to terms associated with these objects.
 	 *     @type string       $orderby                Field(s) to order terms by. Accepts:
-	 *                                                * Term fields ('name', 'slug', 'term_group', 'term_id', 'id',
+	 *                                                * term fields ('name', 'slug', 'term_group', 'term_id', 'id',
 	 *                                                  'description', 'parent', 'term_order'). Unless `$object_ids`
 	 *                                                  is not empty, 'term_order' is treated the same as 'term_id'.
 	 *                                                * 'count' to use the number of objects associated with the term.
-	 *                                                * 'include' to match the 'order' of the `$include` param.
-	 *                                                * 'slug__in' to match the 'order' of the `$slug` param.
-	 *                                                * 'meta_value'
-	 *                                                * 'meta_value_num'.
-	 *                                                * The value of `$meta_key`.
-	 *                                                * The array keys of `$meta_query`.
+	 *                                                * 'include' to match the 'order' of the $include param.
+	 *                                                * 'slug__in' to match the 'order' of the $slug param.
+	 *                                                * 'meta_value', 'meta_value_num'.
+	 *                                                  the value of `$meta_key`.
+	 *                                                  the array keys of `$meta_query`.
 	 *                                                * 'none' to omit the ORDER BY clause.
-	 *                                                Default 'name'.
+	 *                                                Defaults to 'name'.
 	 *     @type string       $order                  Whether to order terms in ascending or descending order.
 	 *                                                Accepts 'ASC' (ascending) or 'DESC' (descending).
 	 *                                                Default 'ASC'.
@@ -117,14 +116,14 @@ class WP_Term_Query {
 	 *     @type int[]|string $include                Array or comma/space-separated string of term IDs to include.
 	 *                                                Default empty array.
 	 *     @type int[]|string $exclude                Array or comma/space-separated string of term IDs to exclude.
-	 *                                                If `$include` is non-empty, `$exclude` is ignored.
+	 *                                                If $include is non-empty, $exclude is ignored.
 	 *                                                Default empty array.
 	 *     @type int[]|string $exclude_tree           Array or comma/space-separated string of term IDs to exclude
-	 *                                                along with all of their descendant terms. If `$include` is
-	 *                                                non-empty, `$exclude_tree` is ignored. Default empty array.
+	 *                                                along with all of their descendant terms. If $include is
+	 *                                                non-empty, $exclude_tree is ignored. Default empty array.
 	 *     @type int|string   $number                 Maximum number of terms to return. Accepts ''|0 (all) or any
 	 *                                                positive number. Default ''|0 (all). Note that $number may
-	 *                                                not return accurate results when coupled with `$object_ids`.
+	 *                                                not return accurate results when coupled with $object_ids.
 	 *                                                See #41796 for details.
 	 *     @type int          $offset                 The number by which to offset the terms query. Default empty.
 	 *     @type string       $fields                 Term fields to query for. Accepts:
@@ -146,14 +145,14 @@ class WP_Term_Query {
 	 *                                                Default 'all'.
 	 *     @type bool         $count                  Whether to return a term count. If true, will take precedence
 	 *                                                over `$fields`. Default false.
-	 *     @type string|array $name                   Name or array of names to return term(s) for.
+	 *     @type string|array $name                   Optional. Name or array of names to return term(s) for.
 	 *                                                Default empty.
-	 *     @type string|array $slug                   Slug or array of slugs to return term(s) for.
+	 *     @type string|array $slug                   Optional. Slug or array of slugs to return term(s) for.
 	 *                                                Default empty.
-	 *     @type int|int[]    $term_taxonomy_id       Term taxonomy ID, or array of term taxonomy IDs,
+	 *     @type int|int[]    $term_taxonomy_id       Optional. Term taxonomy ID, or array of term taxonomy IDs,
 	 *                                                to match when querying terms.
 	 *     @type bool         $hierarchical           Whether to include terms that have non-empty descendants
-	 *                                                (even if `$hide_empty` is set to true). Default true.
+	 *                                                (even if $hide_empty is set to true). Default true.
 	 *     @type string       $search                 Search criteria to match terms. Will be SQL-formatted with
 	 *                                                wildcards before and after. Default empty.
 	 *     @type string       $name__like             Retrieve terms with criteria by which a term is LIKE
@@ -164,8 +163,8 @@ class WP_Term_Query {
 	 *                                                quantity of each term's "count" object variable.
 	 *                                                Default false.
 	 *     @type string       $get                    Whether to return terms regardless of ancestry or whether the
-	 *                                                terms are empty. Accepts 'all' or '' (disabled).
-	 *                                                Default ''.
+	 *                                                terms are empty. Accepts 'all' or empty (disabled).
+	 *                                                Default empty.
 	 *     @type int          $child_of               Term ID to retrieve child terms of. If multiple taxonomies
 	 *                                                are passed, `$child_of` is ignored. Default 0.
 	 *     @type int          $parent                 Parent term ID to retrieve direct-child terms of.
@@ -174,9 +173,9 @@ class WP_Term_Query {
 	 *                                                This parameter has no effect on non-hierarchical taxonomies.
 	 *                                                Default false.
 	 *     @type string       $cache_domain           Unique cache key to be produced when this query is stored in
-	 *                                                an object cache. Default 'core'.
+	 *                                                an object cache. Default is 'core'.
 	 *     @type bool         $update_term_meta_cache Whether to prime meta caches for matched terms. Default true.
-	 *     @type array        $meta_query             Meta query clauses to limit retrieved terms by.
+	 *     @type array        $meta_query             Optional. Meta query clauses to limit retrieved terms by.
 	 *                                                See `WP_Meta_Query`. Default empty.
 	 *     @type string       $meta_key               Limit terms to those matching a specific metadata key.
 	 *                                                Can be used in conjunction with `$meta_value`. Default empty.
diff --git a/wp-includes/comment-template.php b/wp-includes/comment-template.php
index 7db8575e70..5a0072ff6c 100644
--- a/wp-includes/comment-template.php
+++ b/wp-includes/comment-template.php
@@ -262,7 +262,7 @@ function comment_author_link( $comment_ID = 0 ) {
  *
  * @param int|WP_Comment $comment_ID Optional. WP_Comment or the ID of the comment for which to get the author's IP address.
  *                                   Default current comment.
- * @return string Comment author's IP address.
+ * @return string Comment author's IP address, or an empty string if it's not available.
  */
 function get_comment_author_IP( $comment_ID = 0 ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
 	$comment = get_comment( $comment_ID );
@@ -273,7 +273,7 @@ function get_comment_author_IP( $comment_ID = 0 ) { // phpcs:ignore WordPress.Na
 	 * @since 1.5.0
 	 * @since 4.1.0 The `$comment_ID` and `$comment` parameters were added.
 	 *
-	 * @param string     $comment_author_IP The comment author's IP address.
+	 * @param string     $comment_author_IP The comment author's IP address, or an empty string if it's not available.
 	 * @param int        $comment_ID        The comment ID.
 	 * @param WP_Comment $comment           The comment object.
 	 */
diff --git a/wp-includes/customize/class-wp-customize-date-time-control.php b/wp-includes/customize/class-wp-customize-date-time-control.php
index 54671896fa..ac31c418bf 100644
--- a/wp-includes/customize/class-wp-customize-date-time-control.php
+++ b/wp-includes/customize/class-wp-customize-date-time-control.php
@@ -214,7 +214,12 @@ class WP_Customize_Date_Time_Control extends WP_Customize_Control {
 	 *
 	 * @since 4.9.0
 	 *
-	 * @return array abbr and description.
+	 * @return array {
+	 *     Timezone info. All properties are optional.
+	 *
+	 *     @type string $abbr        Timezone abbreviation, eg. PST or CEST.
+	 *     @type string $description Human-readable timezone description as HTML.
+	 * }
 	 */
 	public function get_timezone_info() {
 		$tz_string     = get_option( 'timezone_string' );
diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index c834a01ef4..55282b18df 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -218,6 +218,8 @@ function date_i18n( $format, $timestamp_with_offset = false, $gmt = false ) {
  *
  * @since 5.3.0
  *
+ * @global WP_Locale $wp_locale WordPress date and time locale object.
+ *
  * @param string       $format    PHP date format.
  * @param int          $timestamp Optional. Unix timestamp. Defaults to current time.
  * @param DateTimeZone $timezone  Optional. Timezone to output result in. Defaults to timezone
diff --git a/wp-includes/kses.php b/wp-includes/kses.php
index 81610e1e9a..10dd0b3656 100644
--- a/wp-includes/kses.php
+++ b/wp-includes/kses.php
@@ -854,7 +854,7 @@ function wp_kses_allowed_html( $context = '' ) {
 
 	if ( is_array( $context ) ) {
 		/**
-		 * Filters the HTML that is allowed for a given context.
+		 * Filters the HTML tags that are allowed for a given context.
 		 *
 		 * @since 3.5.0
 		 *
@@ -1040,7 +1040,7 @@ function wp_kses_uri_attributes() {
  *                                                or a context name such as 'post'.
  * @global string[]       $pass_allowed_protocols Array of allowed URL protocols.
  *
- * @param array $matches preg_replace regexp matches
+ * @param array $match preg_replace regexp matches
  * @return string
  */
 function _wp_kses_split_callback( $match ) {
diff --git a/wp-includes/load.php b/wp-includes/load.php
index 812569305a..efe69a67d7 100644
--- a/wp-includes/load.php
+++ b/wp-includes/load.php
@@ -675,7 +675,7 @@ function wp_start_object_cache() {
 	 * @since 5.8.0
 	 *
 	 * @param bool $enable_object_cache Whether to enable loading object-cache.php (if present).
-	 *                                  Default true.
+	 *                                    Default true.
 	 */
 	if ( $first_init && apply_filters( 'enable_loading_object_cache_dropin', true ) ) {
 		if ( ! function_exists( 'wp_cache_init' ) ) {
diff --git a/wp-includes/nav-menu.php b/wp-includes/nav-menu.php
index 2aa147f867..df10ffc45b 100644
--- a/wp-includes/nav-menu.php
+++ b/wp-includes/nav-menu.php
@@ -159,7 +159,7 @@ function get_registered_nav_menus() {
  *
  * @since 3.0.0
  *
- * @return int[] Associative array of registered navigation menu IDs keyed by their
+ * @return int[] Associative array of egistered navigation menu IDs keyed by their
  *               location name. If none are registered, an empty array.
  */
 function get_nav_menu_locations() {
diff --git a/wp-includes/pluggable.php b/wp-includes/pluggable.php
index 4a5891b8fd..f164eb2cbb 100644
--- a/wp-includes/pluggable.php
+++ b/wp-includes/pluggable.php
@@ -2785,7 +2785,8 @@ if ( ! function_exists( 'get_avatar' ) ) :
 		 * @param int    $size        Square avatar width and height in pixels to retrieve.
 		 * @param string $default     URL for the default image or a default type. Accepts '404', 'retro', 'monsterid',
 		 *                            'wavatar', 'indenticon', 'mystery', 'mm', 'mysteryman', 'blank', or 'gravatar_default'.
-		 * @param string $alt         Alternative text to use in the avatar image tag.
+		 *                            Default is the value of the 'avatar_default' option, with a fallback of 'mystery'.
+		 * @param string $alt         Alternative text to use in the avatar image tag. Default empty.
 		 * @param array  $args        Arguments passed to get_avatar_data(), after processing.
 		 */
 		return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args );
diff --git a/wp-includes/post.php b/wp-includes/post.php
index 20072bdcdb..ad140f28d5 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -1391,7 +1391,7 @@ function get_post_types( $args = array(), $output = 'names', $operator = 'and' )
  *     @type bool         $public                Whether a post type is intended for use publicly either via
  *                                               the admin interface or by front-end users. While the default
  *                                               settings of $exclude_from_search, $publicly_queryable, $show_ui,
- *                                               and $show_in_nav_menus are inherited from $public, each does not
+ *                                               and $show_in_nav_menus are inherited from public, each does not
  *                                               rely on this relationship and controls a very specific intention.
  *                                               Default false.
  *     @type bool         $hierarchical          Whether the post type is hierarchical (e.g. page). Default false.
@@ -1417,11 +1417,11 @@ function get_post_types( $args = array(), $output = 'names', $operator = 'and' )
  *                                               of $show_in_menu.
  *     @type bool         $show_in_rest          Whether to include the post type in the REST API. Set this to true
  *                                               for the post type to be available in the block editor.
- *     @type string       $rest_base             To change the base URL of REST API route. Default is $post_type.
- *     @type string       $rest_controller_class REST API controller class name. Default is 'WP_REST_Posts_Controller'.
+ *     @type string       $rest_base             To change the base url of REST API route. Default is $post_type.
+ *     @type string       $rest_controller_class REST API Controller class name. Default is 'WP_REST_Posts_Controller'.
  *     @type int          $menu_position         The position in the menu order the post type should appear. To work,
  *                                               $show_in_menu must be true. Default null (at the bottom).
- *     @type string       $menu_icon             The URL to the icon to be used for this menu. Pass a base64-encoded
+ *     @type string       $menu_icon             The url to the icon to be used for this menu. Pass a base64-encoded
  *                                               SVG using a data URI, which will be colored to match the color scheme
  *                                               -- this should begin with 'data:image/svg+xml;base64,'. Pass the name
  *                                               of a Dashicons helper class to use a font icon, e.g.
diff --git a/wp-includes/user.php b/wp-includes/user.php
index 3d348936c8..b4703142da 100644
--- a/wp-includes/user.php
+++ b/wp-includes/user.php
@@ -1749,7 +1749,7 @@ function validate_username( $username ) {
  *     @type string $admin_color          Admin color scheme for the user. Default 'fresh'.
  *     @type bool   $use_ssl              Whether the user should always access the admin over
  *                                        https. Default false.
- *     @type string $user_registered      Date the user registered. Format is 'Y-m-d H:i:s'.
+ *     @type string $user_registered      Date the user registered in UTC. Format is 'Y-m-d H:i:s'.
  *     @type string $user_activation_key  Password reset key. Default empty.
  *     @type bool   $spam                 Multisite only. Whether the user is marked as spam.
  *                                        Default false.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 52fe74fd74..72ab7961a8 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-51299';
+$wp_version = '5.9-alpha-51300';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-includes/widgets.php b/wp-includes/widgets.php
index 6da6897fde..ff2e219c5e 100644
--- a/wp-includes/widgets.php
+++ b/wp-includes/widgets.php
@@ -1832,7 +1832,7 @@ function wp_setup_widgets_block_editor() {
  */
 function wp_use_widgets_block_editor() {
 	/**
-	 * Filters whether or not to use the block editor to manage widgets.
+	 * Filters whether to use the block editor to manage widgets.
 	 *
 	 * @since 5.8.0
 	 *