DEFUN ("multibyte-string-p", Fmultibyte_string_p, Smultibyte_string_p,
1, 1, 0,
- doc: /* Return t if OBJECT is a multibyte string. */)
+ doc: /* Return t if OBJECT is a multibyte string.
+Return nil if OBJECT is either a unibyte string, or not a string. */)
(Lisp_Object object)
{
if (STRINGP (object) && STRING_MULTIBYTE (object))