From @jerch in https://github.com/xtermjs/xterm.js/pull/1399
C0 control codes without an explicit handler - what to do with those? To reassemble the old behavior those should call InputHandler.print. I still think printing those is faulty behavior, but maybe we should do to keep in line with old parser and address it later?
Possibly affected: #1204
Not sure we care about this, @jerch reopen if you disagree.