Redo fix with redactor.js

gistfile1.js

if (key === 90)
	{
		console.log(this.opts.buffer)
		if (this.opts.buffer !== false)
		{
			e.preventDefault();
			console.log(this.getBuffer());
		}
		else if (e.shiftKey)
		{
			this.shortcuts(e, 'redo');	// Ctrl + Shift + z
		}
		else
		{
			this.shortcuts(e, 'undo'); // Ctrl + z
		}
	}