Deprecate error_text(), __error_text__() * __error_text__.m, error_text.m: New functions added to deprecated/ directory to issue warning message. * NEWS: Add functions to list of deprecated functions in 3.6. * mk_undocumented_list: Remove error_text from alias list. * demo.m, test.m: Replace __error_text__ with lasterr * error.cc: Remove DEFALIAS of functions to lasterr.

#include <octave/oct.h>

DEFUN_DLD (helloworld, args, nargout,
  "Hello World Help String")
{
  int nargin = args.length ();
  octave_stdout << "Hello World has " << nargin
        << " input arguments and "
        << nargout << " output arguments.\n";
  return octave_value_list ();
}