       :ensure exec-path-from-shell)
     (exec-path-from-shell-initialize))
  ((string-equal system-type "gnu/linux") ; Linux
-    (defun new-browser-tab ()
+    (defun ar/new-browser-tab ()
       "Open a new browser tab in the default browser."
       (interactive)
       (shell-command "google-chrome http://google.com")
       ))
  )
-(global-set-key (kbd "C-x t") 'new-browser-tab)
+(global-set-key (kbd "C-x t") 'ar/new-browser-tab)
 
 ;; Disable backup.
 ;; From: http://anirudhsasikumar.net/blog/2005.01.21.html

  (let ((m prog-mode-map))
    (define-key m [f6] 'recompile))
  ;; Show trailing whitespace.
  (set (make-local-variable 'show-trailing-whitespace)
       t))

(add-hook 'prog-mode-hook 'ar/prog-mode-hook)

(use-package centered-cursor-mode


;; Move buffer file.
;; From: https://sites.google.com/site/steveyegge2/my-dot-emacs-file
(defun ar/move-buffer-file (dir)
  "Moves both current buffer and file it's visiting to DIR." (interactive "DNew directory: ")
  (let* ((name (buffer-name))
         (filename (buffer-file-name))
