Remove obsolete doc references to XEmacs (Bug#37899)

* doc/misc/edt.texi (Changes, Goals):
* doc/misc/emacs-mime.texi (Charset Translation):
* doc/misc/gnus-faq.texi (FAQ 4-15):
* doc/misc/pcl-cvs.texi (Bugs):
* doc/misc/srecode.texi (SRecode Minor Mode):
* lisp/cedet/srecode/insert.el (srecode-insert-ask-variable-method):
* lisp/follow.el:
* lisp/leim/quail/ipa.el (ipa-x-sampa, ipa-kirshenbaum):
* lisp/net/newsticker.el:
* lisp/obsolete/iswitchb.el:
* lisp/progmodes/hideshow.el:
* lisp/savehist.el (savehist-file):
* lisp/vc/ediff.el: Remove obsolete references to XEmacs in doc
strings and comments.

8 files changed, 11 insertions, 42 deletions

diff --git a/lisp/cedet/srecode/insert.el b/lisp/cedet/srecode/insert.el
index 966cd485e82..4e25e1f5ca0 100644
--- a/lisp/cedet/srecode/insert.el
+++ b/lisp/cedet/srecode/insert.el
@@ -44,9 +44,7 @@ Dictionary value references that ask begin with the ? character.
 Possible values are:
   `ask'   - Prompt in the minibuffer as the value is inserted.
   `field' - Use the dictionary macro name as the inserted value,
-            and place a field there.  Matched fields change together.
-
-NOTE: The field feature does not yet work with XEmacs."
+            and place a field there.  Matched fields change together."
   :group 'srecode
   :type '(choice (const :tag "Ask" ask)
                  (const :tag "Field" field)))
diff --git a/lisp/follow.el b/lisp/follow.el
index faac87986bb..f80532ce3c4 100644
--- a/lisp/follow.el
+++ b/lisp/follow.el
@@ -25,8 +25,8 @@
 
 ;;; Commentary:
 
-;; `Follow mode' is a minor mode for Emacs and XEmacs that
-;; combines windows into one tall virtual window.
+;; `Follow mode' is a minor mode that combines windows into one tall
+;; virtual window.
 ;;
 ;; The feeling of a "virtual window" has been accomplished by the use
 ;; of two major techniques:
diff --git a/lisp/leim/quail/ipa.el b/lisp/leim/quail/ipa.el
index 3c4c914defa..0949d097d62 100644
--- a/lisp/leim/quail/ipa.el
+++ b/lisp/leim/quail/ipa.el
@@ -122,11 +122,7 @@ allows you to type Kirshenbaum on your ASCII-capable keyboard, producing the
 corresponding actual IPA characters in your editor.
 
 See http://www.kirshenbaum.net/IPA/ascii-ipa.pdf for full details of the
-transliteration.
-
-A caveat with regard to that document; while XEmacs currently preserves
-Unicode diacritics on reading and emitting them, it displays them,
-incorrectly, as separate from the modified glyphs.")
+transliteration.")
 
 (quail-define-rules
  ("g" "ɡ")     ;; Voiced velar plosive                 U+0261
@@ -341,9 +337,7 @@ uses this transliteration to allow you to produce the IPA in your editor
 with a keyboard that's limited to ASCII.
 
 See http://www.phon.ucl.ac.uk/home/sampa/ipasam-x.pdf for a full definition
-of the mapping.  A caveat with regard to that document; while XEmacs
-currently preserves Unicode diacritics on reading and emitting them, it
-displays them, incorrectly, as separate from the modified glyphs.")
+of the mapping.")
 
 (quail-define-rules
  ;; Table taken from http://en.wikipedia.org/wiki/X-SAMPA, checked with
@@ -446,10 +440,7 @@ displays them, incorrectly, as separate from the modified glyphs.")
  ("=\\" "ǂ")   ;; Palatal click                        U+01C2
  ("-\\" "̮")   ;; Linking mark                         U+032E
 
- ;; Diacritics. Note that XEmacs doesn't yet have composed characters, so we
- ;; can input them, but they won't display properly. If you send email using
- ;; them, and the recipient's client is capable, they will get through,
- ;; though.
+ ;; Diacritics.
 
  ("_\"" "̈")   ;; Centralized                          U+0308
  ("_+" "̟")    ;; Advanced                             U+031F
diff --git a/lisp/net/newsticker.el b/lisp/net/newsticker.el
index e1f4c8f89f0..b47dd1f8640 100644
--- a/lisp/net/newsticker.el
+++ b/lisp/net/newsticker.el
@@ -71,11 +71,6 @@
 
 ;; Requirements
 ;; ------------
-;; Newsticker can be used with GNU Emacs version 21.1 or later as well as
-;; XEmacs.  It requires an XML-parser (`xml.el') which is part of GNU
-;; Emacs.  If you are using XEmacs you want to get the `net-utils' package
-;; which contains `xml.el' for XEmacs.
-
 ;; Newsticker requires a program which can retrieve files via http and
 ;; prints them to stdout.  By default Newsticker will use wget for this
 ;; task.
diff --git a/lisp/obsolete/iswitchb.el b/lisp/obsolete/iswitchb.el
index ad2067fdef7..f899c139ea6 100644
--- a/lisp/obsolete/iswitchb.el
+++ b/lisp/obsolete/iswitchb.el
@@ -176,9 +176,6 @@
 ;; iswitch for all buffer selections in Emacs, add:
 ;; (setq read-buffer-function #'iswitchb-read-buffer)
 ;; (This variable was introduced in Emacs 20.3.)
-;; XEmacs users can get the same behavior by doing:
-;; (defalias 'read-buffer #'iswitchb-read-buffer)
-;; since `read-buffer' is defined in lisp.
 
 ;; Using iswitchb for other completion tasks.
 
diff --git a/lisp/progmodes/hideshow.el b/lisp/progmodes/hideshow.el
index c4c75a6c040..53235ea573b 100644
--- a/lisp/progmodes/hideshow.el
+++ b/lisp/progmodes/hideshow.el
@@ -152,18 +152,11 @@
 
 ;; * Bugs
 ;;
-;; (1) Hideshow does not work w/ emacs 18 because emacs 18 lacks the
-;;     function `forward-comment' (among other things).  If someone
-;;     writes this, please send me a copy.
-;;
-;; (2) Sometimes `hs-headline' can become out of sync.  To reset, type
+;; (1) Sometimes `hs-headline' can become out of sync.  To reset, type
 ;;     `M-x hs-minor-mode' twice (that is, deactivate then re-activate
 ;;     hideshow).
 ;;
-;; (3) Hideshow 5.x is developed and tested on GNU Emacs 20.7.
-;;     XEmacs compatibility may have bitrotted since 4.29.
-;;
-;; (4) Some buffers can't be `byte-compile-file'd properly.  This is because
+;; (2) Some buffers can't be `byte-compile-file'd properly.  This is because
 ;;     `byte-compile-file' inserts the file to be compiled in a temporary
 ;;     buffer and switches `normal-mode' on.  In the case where you have
 ;;     `hs-hide-initial-comment-block' in `hs-minor-mode-hook', the hiding of
@@ -178,7 +171,7 @@
 ;;       (let ((hs-minor-mode-hook nil))
 ;;         ad-do-it))
 ;;
-;; (5) Hideshow interacts badly with Ediff and `vc-diff'.  At the moment, the
+;; (3) Hideshow interacts badly with Ediff and `vc-diff'.  At the moment, the
 ;;     suggested workaround is to turn off hideshow entirely, for example:
 ;;
 ;;     (add-hook 'ediff-prepare-buffer-hook #'turn-off-hideshow)
diff --git a/lisp/savehist.el b/lisp/savehist.el
index 83591310829..f00c5b19df8 100644
--- a/lisp/savehist.el
+++ b/lisp/savehist.el
@@ -85,11 +85,7 @@ minibuffer histories, such as `compile-command' or `kill-ring'."
   "File name where minibuffer history is saved to and loaded from.
 The minibuffer history is a series of Lisp expressions loaded
 automatically when Savehist mode is turned on.  See `savehist-mode'
-for more details.
-
-If you want your minibuffer history shared between Emacs and XEmacs,
-customize this value and make sure that `savehist-coding-system' is
-set to a coding system that exists in both emacsen."
+for more details."
   :type 'file)
 
 (defcustom savehist-file-modes #o600
diff --git a/lisp/vc/ediff.el b/lisp/vc/ediff.el
index fae694d5221..d207d75a601 100644
--- a/lisp/vc/ediff.el
+++ b/lisp/vc/ediff.el
@@ -79,8 +79,7 @@
 ;;  1. The undo command doesn't restore deleted regions well.  That is, if
 ;;  you delete all characters in a difference region and then invoke
 ;;  `undo', the reinstated text will most likely be inserted outside of
-;;  what Ediff thinks is the current difference region. (This problem
-;;  doesn't seem to exist with XEmacs.)
+;;  what Ediff thinks is the current difference region.
 ;;
 ;;  If at any point you feel that difference regions are no longer correct,
 ;;  you can hit '!' to recompute the differences.