code: func (e *Edit) Render() {
  	if e.visibility == VisibilityHide {
  		e.clear()
  		return
  	}
  
  	filler := ""
  	l := e.display[e.at:]
  	if len(l) > e.trueW {
  		l = e.display[e.at : e.at+e.trueW]
  	} else {
  		// just erase right hand side
  		filler = strings.Repeat(" ", e.trueW-len(l))
  	}
  	e.w.printf(e.trueX, e.trueY, e.attr, "%v%v", string(l), filler)
  }
docs: // Render implements the Render interface.  This is called from queue context
  // so be careful to not use blocking calls.