From: Noam Postavsky <npostavs@gmail.com>
Date: Tue, 25 Jun 2019 22:57:30 +0000 (-0400)
Subject: ; * lisp/frame.el: Enhance add-variable-watcher commentary.
X-Git-Tag: emacs-26.3~68
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=06b35b2f92;p=emacs.git

; * lisp/frame.el: Enhance add-variable-watcher commentary.
---

diff --git a/lisp/frame.el b/lisp/frame.el
index 30f6ca91ba6..6dc72669685 100644
--- a/lisp/frame.el
+++ b/lisp/frame.el
@@ -2489,7 +2489,9 @@ See also `toggle-frame-maximized'."
 (mapc (lambda (var)
         ;; Using symbol-function here tells the watcher machinery to
         ;; call the C function set-buffer-redisplay directly, thus
-        ;; avoiding a potential GC.
+        ;; avoiding a potential GC.  This isn't strictly necessary,
+        ;; but it's a nice way to exercise the direct subr-calling
+        ;; machinery.
         (add-variable-watcher var (symbol-function 'set-buffer-redisplay)))
       '(line-spacing
         overline-margin