The whole point of gofmt is that you type in whatever you like and gofmt sorts it out for you. So if you're typing your code in a HN comment box, you'd surely just enter it roughly like that - though i recommend not even including the syntactically irrelevant spaces shown here. Your space bar does have a MTBF you know, and it's measured in activations... let gofmt take the strain. It can waste your screen space for you!

gofmt is the good bit about working in Go. Pretty much everybody uses it, and so you can use it too. Some other languages have similar tools, but they're not as pervasive, so it's far too easy to end up in a situation where you can't use the tool because it would just make too much of a mess of the inconsistently manually-formatted stuff that's already there.