Spolsky white line fix

custom.el

 ;; Add these faces to custom. I don't know how to set them otherwise.
(custom-set-faces
 ;; custom-set-faces was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(window-divider ((t (:foreground "#161A1F"))))
 '(window-divider-first-pixel ((t (:foreground "#161A1F"))))
 '(window-divider-last-pixel ((t (:foreground "gray20")))))

frag.el

(setq window-divider-default-right-width 1)
(window-divider-mode)