General, minor refactor

+ Group hooks with add-hook!
+ Sharpquote elfeed call
+ Extract elfeed buffer detector into function and ensure idempotency of
  doom-real-buffer-functions

modules/app/rss/autoload.el

@@ -4,7 +4,7 @@
 (defun =rss ()
   "Activate (or switch to) `elfeed' in its workspace."
   (interactive)
-  (call-interactively 'elfeed))
+  (call-interactively #'elfeed))
 
 ;;;###autoload
 (defun +rss/quit ()

modules/app/rss/config.el

@@ -33,8 +33,9 @@ paths.")
   (make-directory elfeed-db-directory t)
 
   ;; Ensure elfeed buffers are treated as real
-  (push (lambda (buf) (string-match-p "^\\*elfeed" (buffer-name buf)))
-        doom-real-buffer-functions)
+  (defun +rss-buffer-p (buf)
+    (string-match-p "^\\*elfeed" (buffer-name buf)))
+  (add-to-list 'doom-real-buffer-functions #'+rss-buffer-p nil #'eq)
 
   ;; Enhance readability of a post
   (add-hook 'elfeed-show-mode-hook #'+rss|elfeed-wrap)