     (require 'speedbar)
     (speedbar-add-supported-extension '(".v" ".sv" ".svh" ))
         ; http://www.veripool.org/issues/1025-Verilog-mode-Integration-with-the-speedbar
+
+;; disable bell and flashing
+    ; (setq visible-bell 1)
+    (setq ring-bell-function 'ignore)
+        ; https://www.emacswiki.org/emacs/AlarmBell

      )
        ; http://stackoverflow.com/a/27264339/2450748
        ; https://www.gnu.org/software/emacs/manual/html_node/elisp/Using-Interactive.html

    (custom-set-faces
     '(col-highlight ((t (:background "color-233"))))

              (define-key evil-normal-state-local-map (kbd "RET") 'nk-neotree-enter)
              ))
        ; ; https://www.emacswiki.org/emacs/NeoTree

    (defun nk-neotree-enter ()
      (interactive)
      (neotree-enter)
