REST API: Support non-Latin characters in template route regex.

Non-Latin characters are URL-encoded (e.g. `%cf%84%ce%b5%cf%83%cf%84`). Matching `%` in the route ensures templates with non-Latin titles can be properly saved.

Props antonyagrios, mburridge.
Fixes #57329.

Built from https://develop.svn.wordpress.org/trunk@55294


git-svn-id: http://core.svn.wordpress.org/trunk@54827 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/rest-api/endpoints/class-wp-rest-templates-controller.php

@@ -105,7 +105,7 @@ class WP_REST_Templates_Controller extends WP_REST_Controller {
 				// Excludes invalid directory name characters: `/:<>*?"|`.
 				'([^\/:<>\*\?"\|]+(?:\/[^\/:<>\*\?"\|]+)?)',
 				// Matches the template name.
-				'[\/\w-]+'
+				'[\/\w%-]+'
 			),
 			array(
 				'args'   => array(
@@ -834,7 +834,7 @@ class WP_REST_Templates_Controller extends WP_REST_Controller {
 					'context'     => array( 'embed', 'view', 'edit' ),
 					'required'    => true,
 					'minLength'   => 1,
-					'pattern'     => '[a-zA-Z0-9_\-]+',
+					'pattern'     => '[a-zA-Z0-9_\%-]+',
 				),
 				'theme'          => array(
 					'description' => __( 'Theme identifier for the template.' ),

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-beta1-55293';
+$wp_version = '6.2-beta1-55294';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.