made C-x C-x (exchange mark and point) transient-mark-mode friendly

prelude/prelude-core.el

@@ -338,7 +338,7 @@ there's a region, all lines that region covers will be duplicated."
 The new command is named CMD-repeat.  CMD should be a quoted
 command.
 
-This allows you to bind the command to a compound keystroke and
+This allows you to bind the command to a compound keystroke andб
 repeat it with just the final key.  For example:
 
   (global-set-key (kbd \"C-c a\") (make-repeatable-command 'foo))
@@ -348,7 +348,8 @@ just invoke foo.  Typing C-c a a a will invoke foo three times,
 and so on."
   (fset (intern (concat (symbol-name cmd) "-repeat"))
         `(lambda ,(help-function-arglist cmd) ;; arg list
-           ,(format "A repeatable version of `%s'." (symbol-name cmd)) ;; doc string
+           ,(format "A repeatable version of `%s'."
+                    (symbol-name cmd)) ;; doc string
            ,(interactive-form cmd) ;; interactive form
            ;; see also repeat-message-function
            (setq last-repeatable-command ',cmd)
@@ -359,7 +360,8 @@ and so on."
   "Create a new scratch buffer."
   (interactive)
   (progn
-    (switch-to-buffer (get-buffer-create (generate-new-buffer-name "*scratch*")))
+    (switch-to-buffer
+     (get-buffer-create (generate-new-buffer-name "*scratch*")))
     (emacs-lisp-mode)))
 
 (defvar prelude-tips
@@ -375,7 +377,8 @@ and so on."
 
 (defun prelude-tip-of-the-day ()
   (interactive)
-  (message (concat "Prelude tip: " (nth (random (length prelude-tips)) prelude-tips))))
+  (message
+   (concat "Prelude tip: " (nth (random (length prelude-tips)) prelude-tips))))
 
 (defun prelude-eval-after-init (form)
   "Add `(lambda () FORM)' to `after-init-hook'.
@@ -386,5 +389,11 @@ and so on."
     (when after-init-time
       (eval form))))
 
+(defun prelude-exchange-point-and-mark ()
+  "Identical to `exchange-point-and-mark' but will not activate the region."
+  (interactive)
+  (exchange-point-and-mark)
+  (deactivate-mark nil))
+
 (provide 'prelude-core)
 ;;; prelude-core.el ends here

prelude/prelude-global-keybindings.el

@@ -90,6 +90,8 @@
 (global-set-key (kbd "C-=") 'er/expand-region)
 (global-set-key (kbd "C-c w") (make-repeatable-command 'er/expand-region))
 
+(define-key global-map [remap exchange-point-and-mark] 'prelude-exchange-point-and-mark)
+
 (provide 'prelude-global-keybindings)
 
 ;;; prelude-global-keybindings.el ends here