   (whitespace-mode)
   (rainbow-delimiters-mode)
   (hl-line-mode)
+  (rainbow-mode)
   (centered-cursor-mode)
   ;; Language-aware editing commands. Useful for imenu-menu.
   (semantic-mode 1)

  (replace-regexp-in-string " " "-" (downcase title)))

(defun ar/string-digits-p (string)
  "Return t if STRING is an unsigned integer. nil otherwise."
  (if (string-match "\\`[[:digit:]]+\\'" string)
      t
    nil))

      #'flycheck-pos-tip-error-messages)

(add-hook 'after-init-hook #'global-flycheck-mode)

(setq org-src-tab-acts-natively t)

;; Prevent inadvertently editing invisible areas in Org.
(setq org-catch-invisible-edits t)
