(Fyes_or_no_p): Doc fix

Fixes: debbugs:15456

src/ChangeLog

@@ -2,6 +2,7 @@
 
 	* fns.c (Fmaphash): Say what `maphash' returns, since it may be
 	unintuitive (bug#15824).
+	(Fyes_or_no_p): Doc fix (bug#15456).
 
 2014-02-10  Dmitry Antipov  <dmantipov@yandex.ru>
 

src/fns.c

@@ -2425,7 +2425,8 @@ do_yes_or_no_p (Lisp_Object prompt)
 /* Anything that calls this function must protect from GC!  */
 
 DEFUN ("yes-or-no-p", Fyes_or_no_p, Syes_or_no_p, 1, 1, 0,
-       doc: /* Ask user a yes-or-no question.  Return t if answer is yes.
+       doc: /* Ask user a yes-or-no question.
+Return t if answer is yes, and nil if the answer is no.
 PROMPT is the string to display to ask the question.  It should end in
 a space; `yes-or-no-p' adds \"(yes or no) \" to it.