Docs: Add missing description for $wp_locale global.

Props mukesh27.
See #45604, #47110.

git-svn-id: https://develop.svn.wordpress.org/trunk@45737 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/functions.php

@@ -83,7 +83,7 @@ function current_time( $type, $gmt = 0 ) {
  *
  * @since 0.71
  *
- * @global WP_Locale $wp_locale
+ * @global WP_Locale $wp_locale WordPress date and time locale object.
  *
  * @param string   $dateformatstring      Format to display the date.
  * @param int|bool $timestamp_with_offset Optional. A sum of Unix timestamp and timezone offset in seconds.
@@ -202,7 +202,7 @@ function date_i18n( $dateformatstring, $timestamp_with_offset = false, $gmt = fa
  *
  * @since 4.4.0
  *
- * @global WP_Locale $wp_locale
+ * @global WP_Locale $wp_locale WordPress date and time locale object.
  *
  * @param string $date Formatted date string.
  * @return string The date, declined if locale specifies it.
@@ -267,7 +267,7 @@ function wp_maybe_decline_date( $date ) {
  *
  * @since 2.3.0
  *
- * @global WP_Locale $wp_locale
+ * @global WP_Locale $wp_locale WordPress date and time locale object.
  *
  * @param float $number   The number to convert based on locale.
  * @param int   $decimals Optional. Precision of the number of decimal places. Default 0.