Docs: Docblock adjustments in some 5.9 block related functions.

Adds missing `@since` mention to `wp_enqueue_block_style()` and `_wp_multiple_block_styles()`, and a few other minor changes. 

Follow-up to [52069].

See #53359.


git-svn-id: https://develop.svn.wordpress.org/trunk@52354 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/blocks.php

@@ -1191,15 +1191,16 @@ function get_query_pagination_arrow( $block, $is_next ) {
 }
 
 /**
- * Enqueue a stylesheet for a specific block.
+ * Enqueues a stylesheet for a specific block.
  *
  * If the theme has opted-in to separate-styles loading,
  * then the stylesheet will be enqueued on-render,
  * otherwise when the block inits.
  *
+ * @since 5.9.0
+ *
  * @param string $block_name The block-name, including namespace.
  * @param array  $args       An array of arguments [handle,src,deps,ver,media].
- *
  * @return void
  */
 function wp_enqueue_block_style( $block_name, $args ) {
@@ -1220,8 +1221,7 @@ function wp_enqueue_block_style( $block_name, $args ) {
 	 * @param string $content When the callback is used for the render_block filter,
 	 *                        the content needs to be returned so the function parameter
 	 *                        is to ensure the content exists.
-	 *
-	 * @return string
+	 * @return string Block content.
 	 */
 	$callback = static function( $content ) use ( $args ) {
 		// Register the stylesheet.
@@ -1275,9 +1275,10 @@ function wp_enqueue_block_style( $block_name, $args ) {
 /**
  * Allow multiple block styles.
  *
- * @param array $metadata Metadata for registering a block type.
+ * @since 5.9.0
  *
- * @return array
+ * @param array $metadata Metadata for registering a block type.
+ * @return array Metadata for registering a block type.
  */
 function _wp_multiple_block_styles( $metadata ) {
 	foreach ( array( 'style', 'editorStyle' ) as $key ) {