Stefan Monnier <monnier@iro.umontreal.ca> schrieb am Do., 9. Feb. 2017 um
19:02 Uhr:

> >  (defvar MODE-map INIT)                   ; model C
> >  (define-derived-mode MODE ...)
>
> This is the idiomatic form.
>

If that's the case, could you please describe this convention in
https://www.gnu.org/software/emacs/manual/html_node/elisp/Derived-Modes.html
and
fix the example there? Thanks.