Re: custom-mode should not be interactive

[Richard Stallman]

    I'm not sure how to fix it though, as custom-mode is defined through
    define-derived-mode, which always makes the mode function interactive.
    One way is to define a new keyword argument for define-derived-mode.
    What do you think?

I think it would be better not to use `define-derived-mode'.
In fact, `custom-mode' is not derived from another mode.