anchor.diff:                                 :default-modes '(set-tag-mode minibuffer-mode)
                                  :input-buffer (url-bookmark-tags (url buffer))
                                  :completion-function (tag-completion-filter
  -                                                     :with-empty-tag t
  -                                                     :extra-tags (make-tags (extract-keywords body 5)))
  -                               :empty-complete-immediate t))))
  +                                                     :extra-tags (make-tags (extract-keywords body 5)))))))
             (bookmark-add (url buffer)
                           :title (title buffer)
                           :tags tags)
  
positive.code:                          :input-prompt "Space-separated tag(s)"
                           :default-modes '(set-tag-mode minibuffer-mode)
                           :input-buffer (url-bookmark-tags url)
                           :completion-function (tag-completion-filter
                                                 :with-empty-tag t)
                           :empty-complete-immediate t))))
  
      (bookmark-add url :tags tags)))
  
  
negative.code:                          :input-prompt "Space-separated tag(s)"
                           :default-modes '(set-tag-mode minibuffer-mode)
                           :input-buffer (url-bookmark-tags (url result))
                           :completion-function (tag-completion-filter)))))
      (when result
        (bookmark-add (url result) :tags tags))))
  
  