* lisp/textmodes/nroff-mode.el (nroff-mode-map): Remove key 'M-s' (bug#39706)

admin/release-process

@@ -197,16 +197,11 @@ and change key bindings where necessary.  The current list of modes:
 2. Minibuffer binds 'M-s' to 'next-matching-history-element'
    (not useful any more since C-s can now search in the history).
 
-3. 'center-line' in Text mode was already moved to the text formatting
-   keymap as 'M-o M-s' (thus this binding is not necessary any more
-   in 'nroff-mode-map' too and can be removed now from the nroff mode
-   because it can now use the global key binding 'M-o M-s' 'center-line').
-
-4. PCL-CVS binds 'M-s' to 'cvs-status', and log-edit-mode binds it to
+3. PCL-CVS binds 'M-s' to 'cvs-status', and log-edit-mode binds it to
    'log-edit-comment-search-forward'.  Perhaps search commands
    on the global key binding 'M-s' are useless in these modes.
 
-5. Rmail binds '\es' to 'rmail-search'/'rmail-summary-search'.
+4. Rmail binds '\es' to 'rmail-search'/'rmail-summary-search'.
 
 
 * DOCUMENTATION

etc/NEWS

@@ -162,6 +162,12 @@ key             binding
 
 * New Modes and Packages in Emacs 28.1
 
+
+* Incompatible Editing Changes in Emacs 28.1
+
+** In nroff mode, 'center-line' is rebound from 'M-s' to 'M-o M-s',
+so now the search prefix map 'M-s' is available in this mode.
+
 
 * Incompatible Lisp Changes in Emacs 28.1
 

lisp/textmodes/nroff-mode.el

@@ -50,7 +50,6 @@
   (let ((map (make-sparse-keymap))
 	(menu-map (make-sparse-keymap)))
     (define-key map "\t"  'tab-to-tab-stop)
-    (define-key map "\es" 'center-line)
     (define-key map "\e?" 'nroff-count-text-lines)
     (define-key map "\n"  'nroff-electric-newline)
     (define-key map "\en" 'nroff-forward-text-line)