bug#27178: 26.0.50; libxml-parse-*-region functions ignore discard-comments argument

[Noam Postavsky]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> That's as a declaration in the defun?  How would we do this for a
> built-in C function, then?  Hm...

Oh, right, forgot the context.  Should have put `(elisp) Obsolete
Functions':

       In addition, you can mark a particular calling convention for a
    function as obsolete:

     -- Function: set-advertised-calling-convention function signature when
         This function specifies the argument list SIGNATURE as the correct
         way to call FUNCTION.

(The declare form would just expand to a call to this.)