anchor.diff:      (let* ((help-contents
                (str:concat
                 (markup:markup
  +               (:style (style help-buffer))
                  (:h1 "Nyxt tutorial")
                  (:p "The following tutorial introduces the core concepts and the
   basic usage.  For more details, especially regarding the configuration, see
  
positive.code:                                   :location)
                              :file))
           (help-contents (markup:markup
                           (:h1 (symbol-name (sym command))
                                (unless (eq (find-package :nyxt)
                                            (symbol-package (sym command)))
  
negative.code:            (slot-descs (apply #'str:concat (mapcar (alex:rcurry #'describe-slot* input) slots)))
             (help-contents (str:concat
                             (markup:markup
                              (:style (style help-buffer))
                              (:h1 (symbol-name input))
                              (:p (:pre (documentation input 'type)))
                              (:h2 "Slots:"))
  