Don’t create unnecessary marker in ‘delete-trailing-whitespace’

[gnu-emacs] / lisp / textmodes / text-mode.el

diff --git a/lisp/textmodes/text-mode.el b/lisp/textmodes/text-mode.el
index 84b578b505912a36dd265d3e14f8c46a7d590744..731c2d2d85d173758781b0e2c3f040205e7dc32c 100644 (file)
--- a/lisp/textmodes/text-mode.el
+++ b/lisp/textmodes/text-mode.el
@@ -1,6 +1,6 @@
 ;;; text-mode.el --- text mode, and its idiosyncratic commands
 
-;; Copyright (C) 1985, 1992, 1994, 2001-2015 Free Software Foundation,
+;; Copyright (C) 1985, 1992, 1994, 2001-2016 Free Software Foundation,
 ;; Inc.
 
 ;; Maintainer: emacs-devel@gnu.org
@@ -29,7 +29,9 @@
 
 ;;; Code:
 
-(defcustom text-mode-hook nil
+;; Normally non-nil defaults for hooks are bad, but since this file is
+;; preloaded it's ok/better, and avoids this showing up in customize-rogue.
+(defcustom text-mode-hook '(text-mode-hook-identify)
   "Normal hook run when entering Text mode and many related modes."
   :type 'hook
   :options '(turn-on-auto-fill turn-on-flyspell)
@@ -37,7 +39,7 @@
 
 (defvar text-mode-variant nil
   "Non-nil if this buffer's major mode is a variant of Text mode.
-Use (derived-mode-p 'text-mode) instead.")
+Use (derived-mode-p \\='text-mode) instead.")
 
 (defvar text-mode-syntax-table
   (let ((st (make-syntax-table)))
@@ -147,14 +149,13 @@ Turning on Paragraph-Indent minor mode runs the normal hook
 (defalias 'indented-text-mode 'text-mode)
 
 ;; This can be made a no-op once all modes that use text-mode-hook
-;; are "derived" from text-mode.
+;; are "derived" from text-mode.  (As of 2015/04, and probably well before,
+;; the only one I can find that doesn't so derive is rmail-edit-mode.)
 (defun text-mode-hook-identify ()
   "Mark that this mode has run `text-mode-hook'.
 This is how `toggle-text-mode-auto-fill' knows which buffers to operate on."
   (set (make-local-variable 'text-mode-variant) t))
 
-(add-hook 'text-mode-hook 'text-mode-hook-identify)
-
 (defun toggle-text-mode-auto-fill ()
   "Toggle whether to use Auto Fill in Text mode and related modes.
 This command affects all buffers that use modes related to Text mode,