Redefine the `special-mode-map'

[Alexander Shukaev <haroogan@gmail.com>]

Hello everyone,

I'd like to redefine the `special-mode-map'. Accordingly, in the very
beginning of my Emacs configuration I've added the following code:

    (let ((keymap (make-sparse-keymap)))
      (suppress-keymap keymap)
      (define-key keymap (kbd "q") #'quit-window)
      (define-key keymap (kbd "r") #'revert-buffer)
      (setq special-mode-map keymap))

I assume that all the modes which are either derived from `special-mode' or
have `special-mode-map' as a parent to their respective maps should indeed
inherit the above key bindings.

However, this is not the case. [C-h][b] shows that the above code had no
effect and that the default value of `special-mode-map' was still used as a
parent to construct child maps. In contrast, to complicate things,
[C-h][v]special-mode-map shows that `special-mode-map' contains all the
above changes. So what is going on? How to solve this problem?

Thanks and regards,
Alexander