-DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 0, 0,
- doc: /* Perform redisplay.
-If input is available before this starts, redisplay is preempted
-unless `redisplay-dont-pause' is non-nil. */)
- ()
+DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0,
+ doc: /* Perform redisplay if no input is available.
+If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
+perform a full redisplay even if input is available.
+Return t if redisplay was performed, nil otherwise. */)
+ (force)
+ Lisp_Object force;