remove one conflict of standard emacs' M-? ; comment the other

Author: mmaechler

lisp/ess-inf.el

@@ -1998,7 +1998,7 @@ meaning as for `ess-eval-region'."
     (define-key map "\C-c\C-z" #'ess-switch-to-inferior-or-script-buffer) ; mask comint map
     (define-key map "\C-d"     #'delete-char)   ; EOF no good in S
     (define-key map "\t"       #'completion-at-point)
-    (define-key map "\M-?"     #'ess-complete-object-name)
+    (define-key map "\M-?"     #'ess-complete-object-name); stealing  M-? from xref(standard Emacs)
     (define-key map "\C-c\C-k" #'ess-request-a-process)
     (define-key map ","        #'ess-smart-comma)
     (define-key map "\C-c\C-d"  'ess-doc-map)

lisp/ess-r-mode.el

@@ -264,7 +264,7 @@ value by using `ess-r-runners-reset'."
 (defvar ess-r-mode-map
   (let ((map (make-sparse-keymap)))
     (define-key map (kbd "C-c C-=") #'ess-cycle-assign)
-    (define-key map "\M-?" #'ess-complete-object-name)
+    ;;(define-key map "\M-?" #'ess-complete-object-name); not stealing  M-?  from "standard Emacs"
     (define-key map (kbd "C-c C-.") 'ess-rutils-map)
     map))