* lisp/progmodes/prog-mode.el
(prettify-symbols-unprettify-at-point): Doc fix.
set to nil, the prettification persists even when point is
on the symbol.
-This will only have an effect if it is set to a non-nil before
-`prettify-symbols-mode' is activated."
+This will only have an effect if it is set to a non-nil value
+before `prettify-symbols-mode' is activated."
:version "25.1"
:type '(choice (const :tag "Never unprettify" nil)
(const :tag "Unprettify when point is inside" t)