(Forcing Redisplay): Clarify previous change.

diff --git a/lispref/display.texi b/lispref/display.texi
index 1915505dd8cf04a52dc09451716f0e29a385469c..bf5f89f18a1c6a65058687fdf17009b17ab0ff0a 100644 (file)
--- a/lispref/display.texi
+++ b/lispref/display.texi
@@ -96,12 +96,13 @@ binding @code{redisplay-dont-pause} to a non-@code{nil} value.
 
 @tindex redisplay-preemption-period
 @defvar redisplay-preemption-period
-This variable controls how often Emacs checks for new input during
-redisplay.  The default setting is to check for input every 0.1
-seconds after redisplay has started.  If input arrives, redisplay
-stops, and all available input is processed before redisplay starts over.
-  If this variable is set to @code{nil}, redisplay--once started--is never
-preempted by input.
+This variable specifies how many seconds Emacs waits between checks
+for new input during redisplay.  (The default is 0.1 seconds.)  If
+input has arrived when Emacs checks, it pre-empts redisplay and
+processes the available input before trying again to redisplay.
+
+If this variable is @code{nil}, Emacs does not check for input during
+redisplay, and redisplay cannot be preempted by input.
 
 @emph{Note} that this variable is only available if Emacs is built
 with support for sub-second timers.