Re: ls-lisp patch

[Richard Stallman]

    If you load ls-lisp.el for some reason, for instance with

    M-x customize-group ls-lisp

    then the function insert-directory gets redefined.  That can be
    unfortunate.

Thanks for noticing this.  You are right, this is a bug.

However, I see no need to rename the variable or make it a minor mode.
All that's needed is to change the default value of the variable,
to make that conditional on the system.