lang/emacs-lisp: add popup rule for buttercup results

modules/lang/emacs-lisp/config.el

@@ -133,6 +133,7 @@ This marks a foldable marker for `outline-minor-mode' in elisp buffers.")
   ;; it will associate it with the mode.
   (defvar buttercup-minor-mode-map (make-sparse-keymap))
   :config
+  (set-popup-rule! "^\\*Buttercup\\*$" :size 0.45 :select nil :ttl 0)
   (set-yas-minor-mode! 'buttercup-minor-mode)
   (when (featurep 'evil)
     (add-hook 'buttercup-minor-mode-hook #'evil-normalize-keymaps))