Doc fix for prettify-symbols-unprettify-at-point

* lisp/progmodes/prog-mode.el
(prettify-symbols-unprettify-at-point): Document that it has to be
set before enabling 'prettify-symbols-mode'.  (Bug#65884)

diff --git a/lisp/progmodes/prog-mode.el b/lisp/progmodes/prog-mode.el
index 0f3a477abe53bb0e2eb32cf6c0800281e5b0461f..4d8246155e9f515cd4811e93975b89df31ce167e 100644 (file)
--- a/lisp/progmodes/prog-mode.el
+++ b/lisp/progmodes/prog-mode.el
@@ -216,7 +216,10 @@ If set to the symbol `right-edge', also unprettify if point
 is immediately after the symbol.  The prettification will be
 reapplied as soon as point moves away from the symbol.  If
 set to nil, the prettification persists even when point is
-on the symbol."
+on the symbol.
+
+This will only have an effect if it is set to a non-nil before
+`prettify-symbols-mode' is activated."
   :version "25.1"
   :type '(choice (const :tag "Never unprettify" nil)
                  (const :tag "Unprettify when point is inside" t)