bug#35487: Make visiting function from help-mode more customizable

[martin rudalics]

> As a side effect, `C-h f' opens *Help* buffer in the same window.  I
> still want to open *Help* in other window (original behavior).  Do you
> have idea to do so?

You could try with

(defun display-buffer-condition-from-help (_buffer-name _action)
  (string-match-p "\\`\\*\\(Help\\)\\*\\(\\|<[0-9]+>\\)\\'"
                  (buffer-name (window-buffer))))

martin