bug#72080: imenu returns different lists in emacs-news-mode and emacs-news-view-mode

[Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

> For some reason I cannot get emacs-news-view-mode inherit the
> keymap of special-mode, nor even use its own keymap I defined in a
> defvar emacs-news-view-mode-map.  Stefan, any reason why a simple
> definition of emacs-news-view-mode-map doesn't work, as the ELisp
> manual promises it should (where it described define-derived-mode)?

Can't think of a reason, no.

> Also, any idea why syntax-ppss thinks the final ^L in NEWS, here:
>
>   ---
>   *** Emacs on MS-Windows now supports the ':stipple' face attribute.
>
>   ^L
>   ----------------------------------------------------------------------
>   This file is part of GNU Emacs.
>
> is in a comment when emacs-news-view-mode inherits from special-mode?

No, sorry.

> Do we have a way of making one mode use the syntax table of another
> mode without having a variable which holds the latter?

`C-h o` says:

    define-derived-mode is an autoloaded Lisp macro in ‘derived.el’.
    [...]
    KEYWORD-ARGS:
    [...]
               :syntax-table TABLE
                       Use TABLE instead of the default
                       (CHILD-syntax-table).  A nil value means to
                       simply use the same syntax-table as the parent.

so `:syntax-table` should be able to do that.


        Stefan