-padding option is ignored

[pacohope]

Hi. I know you've just put this little utility out there and it's not some critical production thing. I've had a really productive morning thanks to it, though. I've been building out a grammar and testing it incrementally with this tool. Thanks!

The -padding option is parsed and mostly plumbed in, but fundamentally it is ignored. This has been a bit difficult for me because it is putting spaces in around terminals and I can't figure out how or where they are. I'm not much of a go programmer myself. Would you mind propagating the padding option, in particular making it possible to have no padding around terminals whatsoever?

Thanks,
Paco