 
 (use-package flyspell :commands (flyspell-mode-on))
 
+(use-package fill-column-indicator :ensure t
+  :commands (turn-on-fci-mode)
+
+;; I prefer sentences to end with one space instead.
+(setq sentence-end-double-space nil)
+
 (defun ar/org-mode-hook-function ()
   "Called when entering org mode."
   (add-hook 'after-change-functions

    (term-send-string
     proc
     (concat "cd ~/Downloads && youtube-dl " url "\n"))))

(defun ar/view-clipboard-buffer ()
  "View clipboard buffer."

  (centered-cursor-mode)
  ;; Language-aware editing commands. Useful for imenu-menu.
  (semantic-mode 1)
  (turn-on-fci-mode)
  (yas-minor-mode))

(defun ar/markdown-mode-hook-function ()
