Docs: Clarify that `$name` and `$value` parameters of `set_user_setting()` can contain hyphens.

Props tmatsuur.
Fixes #47938.
Built from https://develop.svn.wordpress.org/trunk@45899


git-svn-id: http://core.svn.wordpress.org/trunk@45710 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/option.php

@@ -969,7 +969,7 @@ function get_user_setting( $name, $default = false ) {
 /**
  * Add or update user interface setting.
  *
- * Both $name and $value can contain only ASCII letters, numbers and underscores.
+ * Both $name and $value can contain only ASCII letters, numbers, hyphens, and underscores.
  *
  * This function has to be used before any output has started as it calls setcookie().
  *

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45898';
+$wp_version = '5.3-alpha-45899';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.