Feeds: Add an optional `$post` parameter to `get_the_title_rss()`.

This allows the function to be used outside of the loop and brings parity with `get_the_title()`.

Follow-up to [1976], [3314], [21735].

Props khokansardar, oglekler.
Fixes #61139.
Built from https://develop.svn.wordpress.org/trunk@58096


git-svn-id: http://core.svn.wordpress.org/trunk@57561 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/feed.php

@@ -150,11 +150,13 @@ function wp_title_rss( $deprecated = '–' ) {
  * Retrieves the current post title for the feed.
  *
  * @since 2.0.0
+ * @since 6.6.0 Added the `$post` parameter.
  *
+ * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
  * @return string Current post title.
  */
-function get_the_title_rss() {
-	$title = get_the_title();
+function get_the_title_rss( $post = 0 ) {
+	$title = get_the_title( $post );
 
 	/**
 	 * Filters the post title for use in a feed.

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-alpha-58095';
+$wp_version = '6.6-alpha-58096';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.