The writeln method accept more than one argument.

According to http://www.w3.org/TR/2000/WD-DOM-Level-2-HTML-20001113/html.html#ID-75233634 both write and writeln accept only one parameter, though it seems that all browsers accept more parameters and just concatenate them.

I have looked at http://www.w3schools.com/jsref/met_doc_writeln.asp where it is marked as var_args ("Multiple arguments can be listed and they will be appended to the document in order of occurrence"), but that may not the standard.

T108423 is a duplicate, but since the other ticket has an already merged patch, let's merge this task in rather than the other way round.