legend.m: Text objects should inherit textcolor, interpreter properties from legend (bug #40064). * scripts/plot/legend.m: Match variable names in function prototype to docstring. Get textcolor and interpreter properties from legend axis object and apply them when creating text objects. Use '~' to ignore dummy input to callback functions. Remove some for loops for performance.

#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 ();
}