(line-number-mode): Doc fix.

diff --git a/lisp/simple.el b/lisp/simple.el
index 4f78df506e3e822ca8fb383a1cb3011b717fd638..9e51d95d9bc8f7f4499f42148deb0beac1fc220d 100644 (file)
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -3245,7 +3245,10 @@ specialization of overwrite-mode, entered by setting the
   "Toggle Line Number mode.
 With arg, turn Line Number mode on iff arg is positive.
 When Line Number mode is enabled, the line number appears
-in the mode line."
+in the mode line.
+
+Line numbers do not appear for very large buffers, see variable
+`line-number-display-limit'."
   (interactive "P")
   (setq line-number-mode
        (if (null arg) (not line-number-mode)