Move markdown-mode-func to viewing library

emacs/.emacs.d/init.el

@@ -141,10 +141,6 @@ MODE1 is enabled and vice-versa."
   "Set the `disabled' property for each item in FUNCTIONS to nil."
   (mapc #'(lambda (f) (put f 'disabled nil)) functions))
 
-(defun oni:markdown-mode-func ()
-  "Function for `markdown-mode-hook'."
-  (setq-local whitespace-style '(face trailing)))
-
 (defun oni:maybe-fci-mode ()
   "Turn on `fci-mode' if there is a filename for the buffer."
   (when (buffer-file-name)
@@ -1036,7 +1032,7 @@ If no direction is given, don't split."
 (oni:add-hooks 'lua-mode-hook 'oni:set-keys-for-lua)
 
 (oni:add-hooks 'markdown-mode-hook
-  #'whitespace-mode #'oni:markdown-mode-func)
+  #'whitespace-mode 'oni:show-trailing-whitespace)
 
 (oni:add-hooks 'php-mode-hook
   #'oni:php-mode-func)

emacs/.emacs.d/site-lisp/oni-viewing.el

@@ -25,10 +25,17 @@
 
 ;;; Code:
 
+(require 'whitespace)
+
 ;;;###autoload
 (defun oni:make-readable ()
   "Make non-programming buffers a little more readable."
   (setq line-spacing .2))
 
+;;;###autoload
+(defun oni:show-trailing-whitespace ()
+  "Function for `markdown-mode-hook'."
+  (setq-local whitespace-style '(face trailing)))
+
 (provide 'oni-viewing)
 ;;; oni-viewing.el ends here