Docs: Add a @since note about new parameters with the spread operator added to function signatures.

Props jrf.
See #47678.
Built from https://develop.svn.wordpress.org/trunk@46451


git-svn-id: http://core.svn.wordpress.org/trunk@46249 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/formatting.php

@@ -4868,6 +4868,9 @@ function wp_pre_kses_less_than_callback( $matches ) {
  * WordPress implementation of PHP sprintf() with filters.
  *
  * @since 2.5.0
+ * @since 5.3.0 Formalized the existing and already documented `...$args` parameter
+ *              by adding it to the function signature.
+ *
  * @link https://secure.php.net/sprintf
  *
  * @param string $pattern The string which formatted args are inserted.