emacs-28 b5a0eda: Prefer "graphical displays" to "X terminals" in documentation

[Stefan Kangas]

branch: emacs-28
commit b5a0eda978738467eed16b9a530d175c33418362
Author: Stefan Kangas <stefan@marxist.se>
Commit: Stefan Kangas <stefan@marxist.se>

    Prefer "graphical displays" to "X terminals" in documentation
    
    * doc/lispref/objects.texi (Ctl-Char Syntax): Fix incorrect remark;
    some text terminals can generate ASCII control characters.
    (Other Char Bits):
    * lisp/bindings.el:
    * lisp/gnus/gnus-undo.el (gnus-undo-mode-map): Say "graphical display"
    and "GUI display" instead of "X terminal"; the latter term is
    archaic.  (Bug#51217)
---
 doc/lispref/objects.texi | 10 +++++-----
 lisp/bindings.el         |  2 +-
 lisp/gnus/gnus-undo.el   |  2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/doc/lispref/objects.texi b/doc/lispref/objects.texi
index 365d5ac..a20343f 100644
--- a/doc/lispref/objects.texi
+++ b/doc/lispref/objects.texi
@@ -516,9 +516,9 @@ codes for these non-@acronym{ASCII} control characters 
include the
 2**26
 @end ifnottex
 bit as well as the code for the corresponding non-control character.
-Ordinary text terminals have no way of generating non-@acronym{ASCII}
-control characters, but you can generate them straightforwardly using
-X and other window systems.
+Not all text terminals can generate non-@acronym{ASCII} control
+characters, but it is straightforward to generate them using X and
+other window systems.
 
   For historical reasons, Emacs treats the @key{DEL} character as
 the control equivalent of @kbd{?}:
@@ -588,8 +588,8 @@ character is upper case or lower case.  Emacs uses the
 2**25
 @end ifnottex
 bit to indicate that the shift key was used in typing a control
-character.  This distinction is possible only when you use X terminals
-or other special terminals; ordinary text terminals do not report the
+character.  This distinction is possible only on a graphical display
+such as a GUI display on X; text terminals do not report the
 distinction.  The Lisp syntax for the shift bit is @samp{\S-}; thus,
 @samp{?\C-\S-o} or @samp{?\C-\S-O} represents the shifted-control-o
 character.
diff --git a/lisp/bindings.el b/lisp/bindings.el
index 2c45710..121e484 100644
--- a/lisp/bindings.el
+++ b/lisp/bindings.el
@@ -981,7 +981,7 @@ if `inhibit-field-text-motion' is non-nil."
 (define-key ctl-x-map "\M-:" 'repeat-complex-command)
 (define-key ctl-x-map "u" 'undo)
 (put 'undo :advertised-binding [?\C-x ?u])
-;; Many people are used to typing C-/ on X terminals and getting C-_.
+;; Many people are used to typing C-/ on GUI frames and getting C-_.
 (define-key global-map [?\C-/] 'undo)
 (define-key global-map "\C-_" 'undo)
 ;; Richard said that we should not use C-x <uppercase letter> and I have
diff --git a/lisp/gnus/gnus-undo.el b/lisp/gnus/gnus-undo.el
index 64ed2bb..07cf5d4 100644
--- a/lisp/gnus/gnus-undo.el
+++ b/lisp/gnus/gnus-undo.el
@@ -81,7 +81,7 @@
       "\M-\C-_"     gnus-undo
       "\C-_"        gnus-undo
       "\C-xu"       gnus-undo
-      ;; many people are used to type `C-/' on X terminals and get `C-_'.
+      ;; Many people are used to type `C-/' on GUI frames and get `C-_'.
       [(control /)] gnus-undo)
     map))