Docs: In various @return tags, list the expected type first, instead of false or WP_Error.

Follow-up to [46696], [47060], [49926], [49927].

See #51800.

git-svn-id: https://develop.svn.wordpress.org/trunk@49929 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-hook.php

@@ -194,7 +194,7 @@ final class WP_Hook implements Iterator, ArrayAccess {
 	 *
 	 * @param string         $tag               Optional. The name of the filter hook. Default empty.
 	 * @param callable|false $function_to_check Optional. The callback to check for. Default false.
-	 * @return int|bool If `$function_to_check` is omitted, returns boolean for whether the hook has
+	 * @return bool|int If `$function_to_check` is omitted, returns boolean for whether the hook has
 	 *                  anything registered. When checking a specific function, the priority of that
 	 *                  hook is returned, or false if the function is not attached.
 	 */