KSES: Add support for CSS `repeat()` function.

Introduces support for the CSS `repeat()` function to support complex grid layouts.

Props isabel_brison, azaozz.
Fixes #58551.

Built from https://develop.svn.wordpress.org/trunk@55944


git-svn-id: http://core.svn.wordpress.org/trunk@55456 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/kses.php

@@ -2279,7 +2279,7 @@ function kses_init() {
  *              Extended `margin-*` and `padding-*` support for logical properties.
  * @since 6.2.0 Added support for `aspect-ratio`, `position`, `top`, `right`, `bottom`, `left`,
  *              and `z-index` CSS properties.
- * @since 6.3.0 Extended support for `filter` to accept a URL.
+ * @since 6.3.0 Extended support for `filter` to accept a URL and added support for repeat().
  *
  * @param string $css        A string of CSS rules.
  * @param string $deprecated Not used.
@@ -2563,7 +2563,7 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 			 * Nested functions and parentheses are also removed, so long as the parentheses are balanced.
 			 */
 			$css_test_string = preg_replace(
-				'/\b(?:var|calc|min|max|minmax|clamp)(\((?:[^()]|(?1))*\))/',
+				'/\b(?:var|calc|min|max|minmax|clamp|repeat)(\((?:[^()]|(?1))*\))/',
 				'',
 				$css_test_string
 			);

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.3-alpha-55943';
+$wp_version = '6.3-alpha-55944';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.