Re: Additional safe-local-variables

[Richard Stallman]

    I added it to `subr.el' in the "Misc. useful functions." part:

    (defun string-or-null-p (object)
      "Return t if OBJECT is a string or nil.
    Otherwise, return nil."
      (or (stringp object) (null object)))

defun is best here, I think; we are not concerned about speed.

Could you please add this to NEWS and the Lisp Manual?