Embedded code snippets in README files don't render correctly

[daveverwer]

I think GitHub have been doing some more changes to README file rendering.

On SPI:

On GitHub:

These snippets are inserted by just including a URL containing line numbers, like this:

The LiveQuery client interface is based around the concept of `Subscription`s. You can register any `Query` for live updates from the associated live query server and use the query as a view model for a SwiftUI view by simply using the `subscribe` property of a query: https://github.com/netreconlab/Parse-Swift/blob/0c17c781a211299f324753fa9bcbb6845c22fad2/ParseSwift.playground/Pages/19%20-%20SwiftUI%20-%20LiveQuery.xcplaygroundpage/Contents.swift#L66-L125

I have added one of these to Leftpad for testing