Twenty Fifteen: Add missing documentation for some global variables.

Props sabernhardt, upadalavipul, shailu25, rajinsharwar, audrasjb, viralsampat, noruzzaman, huzaifaalmesbah, SergeyBiryukov.
See #58715.

git-svn-id: https://develop.svn.wordpress.org/trunk@62468 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-content/themes/twentyfifteen/functions.php

@@ -36,6 +36,8 @@
 
 /**
  * Twenty Fifteen only works in WordPress 4.1 or later.
+ *
+ * @global string $wp_version The WordPress version string.
  */
 if ( version_compare( $GLOBALS['wp_version'], '4.1-alpha', '<' ) ) {
 	require get_template_directory() . '/inc/back-compat.php';
@@ -50,6 +52,8 @@
 	 * as indicating support for post thumbnails.
 	 *
 	 * @since Twenty Fifteen 1.0
+	 *
+	 * @global string $wp_version The WordPress version string.
 	 */
 	function twentyfifteen_setup() {
 
@@ -499,6 +503,8 @@ function twentyfifteen_block_editor_styles() {
  * @since Twenty Fifteen 1.7
  * @deprecated Twenty Fifteen 3.4 Disabled filter because, by default, fonts are self-hosted.
  *
+ * @global string $wp_version The WordPress version string.
+ *
  * @param array   $urls          URLs to print for resource hints.
  * @param string  $relation_type The relation type the URLs are printed.
  * @return array URLs to print for resource hints.

src/wp-content/themes/twentyfifteen/inc/back-compat.php

@@ -32,6 +32,8 @@ function twentyfifteen_switch_theme() {
  * Twenty Fifteen on WordPress versions prior to 4.1.
  *
  * @since Twenty Fifteen 1.0
+ *
+ * @global string $wp_version The WordPress version string.
  */
 function twentyfifteen_upgrade_notice() {
 	printf(
@@ -48,6 +50,8 @@ function twentyfifteen_upgrade_notice() {
  * Prevents the Customizer from being loaded on WordPress versions prior to 4.1.
  *
  * @since Twenty Fifteen 1.0
+ *
+ * @global string $wp_version The WordPress version string.
  */
 function twentyfifteen_customize() {
 	wp_die(
@@ -68,6 +72,8 @@ function twentyfifteen_customize() {
  * Prevents the Theme Preview from being loaded on WordPress versions prior to 4.1.
  *
  * @since Twenty Fifteen 1.0
+ *
+ * @global string $wp_version The WordPress version string.
  */
 function twentyfifteen_preview() {
 	if ( isset( $_GET['preview'] ) ) {