Fix code snippet in README

[samWson]

There is something odd about how the code snippets are being rendered in the README. However looking at the markdown code it appears to be fine.

When I have a look at the same file in MacDown on my computer, the code snippets are rendered and displayed correctly. Maybe there is some small quirk with how Github renders markdown?

[macta]

Yeah it's weird - the markdown is supposed to imply that the code and paragraphs are indented under the 2nd list item - but its not doing that.

It seems like it doesn't like the indented formatting, so I just removed it for now - but I do think we could do with a formatting pass on the docs in general, so will leave it open for now.

[samWson]

Closing this. Not relevant anymore.