(popup-dialog-box): Don't quote nil and t in docstrings.

diff --git a/lisp/emacs-lisp/lmenu.el b/lisp/emacs-lisp/lmenu.el
index 17c6de63a7a20b273698486108c7b500d8cbca88..b97b3577edbf2c205d9ed0b27baf43ae1b8e5a3b 100644 (file)
--- a/lisp/emacs-lisp/lmenu.el
+++ b/lisp/emacs-lisp/lmenu.el
@@ -143,7 +143,7 @@ If the `callback' of a button is a symbol, then it must name a command.
 It will be invoked with `call-interactively'.  If it is a list, then it is
 evaluated with `eval'.
 
-One (and only one) of the buttons may be `nil'.  This marker means that all
+One (and only one) of the buttons may be nil.  This marker means that all
 following buttons should be flushright instead of flushleft.
 
 The syntax, more precisely: